Spark Plug Wires Arcing Symptoms

Spray the wires with water to confirm. The Spark Plug terminals should have a sandy color and not be blackened with soot, white from an overheating combustion chamber, or greenish from coolant. Spark plug wires could use the greatest conductors in the world and still not work if the insulation isn't up to the task. Here's How You Diagnose An Engine That Won't Start. Holley® has been the undisputed leader in fuel systems for over 100 years. Did as you suggested, arcing problem totally resolved, great spark on plug to motor. May not be the coil that's bad , it might just need new wire(s) and it could also be your spark plugs are ready to be replaced too (higher resistance will cause arcing). I have replaced all plug wires , all plugs (41-992 ac ) dist cap, rotor button, and coil. I know there are other more definitive ways to test the wires but I wanted to just do a quick ohm test. I started with Autolite plugs gapped at. I swapped out the coil, but the same issues as stated above remains, including the coil to engine block sparking. Seems like you have a fouled plug, but in fact it's the cap thats fouled. Spark Plugs Do Tell A Story! Below is an overview of spark plug conditions and causes. This particular design consists of one ignition coil per cylinder. It's just like pulling a plug wire off the spark plug ,,only shorting the spark to ground won't cause internal coil arcing & damage the main coil. after 3 straight sets of accell wires iwon't own another set. All that was when I had the problem a few years back. So, the higher quality connector, wiring, and shielding will provide more of your spark from the coilpack, to your spark plug. CASE 1: If you got spark from all six spark plug wires. 035, which is where they're at now. Plug wires may or may not need replacement depending upon mileage, and we recommend replacing carbon-core wires (resistance wires) after about 15,000 miles on older cars. When I disconnect the injector clip or the spark plug wire, the car sound like it normally would when running on 5, but when I connect the injector and spark plug wire, it makes a loud tapping sound, very echoey, coming through the intake manifold, and the intake manifold near #6 is all hot. If you leave the wire open, the spark has nowhere to go, and will try to jump to the metal case and short out internally. Taylor Cable Spark Plug Wire Set [79205-409 Spiro Wound Core]. If not, there is a problem with spark delivery. In fact, each foot of finished wire includes 40 ft. I assume you already replaced/checked the spark plugs?. Perform a spark plug wire resistance test. 250") or more outside the engine. I mention this because if you show symptoms of arcing on the coil terminal, there will be at least as much black stuff inside the socket on the spark plug wire. The spark plug gap also has a bearing on engine performance. This system uses conductor strips instead of spark plugs wires to transfer electricity from coils to the spark plugs. Run the engine in a dark area and look for arcing from the spark plug wires to the engine. New plugs installed last time, vacuum caps capped nice and snug like. If wires show any clear injury this kind of as burned or cracked insulation, chaffing, loose plug boots or terminals, the wires need to be replaced. With the cowling off, and all lights off around me, I could see arcing around the top right cylinder's spark plug (cyl 2?). Backfiring. 2 MPI engines. What is the best way to do this?. Not saying it couldnt be a bad wire or plug new, But was doing same thing before, seems to be to much resistance somewhere as voltage is taking path of least resistance but looks like Merc would have known of this issue as this is not the first time ive heard of this ???. I like to keep my wires and boots clean to avoid spark jump to the outside along the wire. All that was when I had the problem a few years back. Sometimes bad wires cannot be discovered without cutting them open. Most people run into this issue when they attempt to replace the spark plugs on their Chevrolet Spark and Cruze models. Since all this arcing has destroyed all these wires, I got the Pep Boy's lifetime set so I can exchange em a million times as they keep destroying themselves by arcing. If wires show any obvious damage such as burned or cracked insulation, chaffing, loose plug boots or terminals, the wires should be replaced. The bulb's intense heat can scorch or melt the socket and insulation on the fixture's wires, which increases the risk of arcing — sparks that jump through the air from one wire to another — a chief cause of electrical fires. 7 is a parade pattern with a higher-than-normal firing line and a spark line that arcs down from very high on the firing line. Start the engine when it is completely dark and look along the wire for evidence of arcing. Precautions. tech about the problems I was having with > an MSD 5900 Blaster ignition and an MSD 8202 Baster 2 coil. N/A: Faulty spark plug. Better yet, just replace them. Sometimes just looking over the wires at night you can see where it's arcing. With the car running, open the hood, and spray your spark plug wires with water from a spray bottle, if the car stutters, or dies, or you see spark arcing when you spray, the wire insulation is bad, and its time for a tune up!. Diagnosing BMW 530xi Spark Plug Problems. I use a little bit of anti-seize when I install spark plugs. Apply a small amount of silicone dielectric grease to the terminals to prevent corrosion and arcing. Has anyone had any luck cleaning fouled spark plugs? I have 7 that have less than 16 miles on them that my 125 has decided are no good. 9 i replaced the ignition coil, cap, rotors, spark plugs, plug wires, fuel pump, hallowed out my cat and replaced the exhaust. When you check for spark, the spark must jump at least 1/4" (. It may also be a computer problem. Insert the leads into a working electrical outlet and verify that you get a reading. What is the best way to do this?. Rough Engine Idle. gapping spark plug with 2 side electrodes torque spec for v6 spark plugs. Incorrect spark plug gap Regap spark plug to manufacturer’s specifications. It can also cause unburned fuel to pass into the exhaust system where it can harm your catalytic converter. Once an arc path is established thru broken down insulation, it is forever a low resistance path for spark due to carbonized plastic providing the easier path to ground (compared to an even normal spark plug gap) and only gets worse as arcing along those paths continues. Besides, the auto repair shop does not sell just one wire. • In some owner's manuals, the AC 41-993 spark plug used in 496 and 8. Because of this, the voltage will slowly rise across the capacitor as it charges. However, if the point dwell is too great, the contact points will not open far enough, resulting in arcing or burning of the points. Next, check the condition of the spark plugs and spark plug wires (if your engine uses spark plug wires). However, it's still a good idea to test the wires that carry the voltage necessary to run your engine. In fact, each foot of finished wire includes 40 ft. As the humidity increases, the intake air mass decreases. I started with Autolite plugs gapped at. Inspect the spark plug wire. The quickest as well as easiest way to test for spark is to remove one of the spark plug wires from a spark plug and connect it to an HEI spark tester or old spark plug. The third wire is the electrical ground which is just connected to the metal case of the appliance. This is necessary due to the aging of the spark plug wires from exposure to extreme temperatures (hot and cold), engine chemicals (oil, grease, coolant, etc. (I don't have a multimeter anymore to test them. If the spark plug looks visibly fine (if not, replace it), swap it with another cylinder, similar to the coil swap. spark plug wire - posted in REV Chassis - Performance and Trail Models: 07 renegadei broke the metal connector inside the spark plug wire. 9 i replaced the ignition coil, cap, rotors, spark plugs, plug wires, fuel pump, hallowed out my cat and replaced the exhaust. Spark plug wires (also called "ignition cables") carry high voltage current from the ignition coil(s) to the spark plugs. Multi-Episode Arcing. An arcing plug wire can cause a weak spark or no spark at all in the cylinder with the bad wire. SPARK PLUG FACTS "Corona vs. They most definatly can. You will want to focus your spray near the boots that attach to the spark plugs to see if any arcing occurs there. com! You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. Ferret - Thanks for your quick reply! Before I changed the spark plugs, the codes were for misfires on 3 cylinders. 2006 HONDA PILOT Service Repair Workshop Manual provides step-by-step instructions based on the. If wires demonstrate any apparent damage such as burned or cracked insulation, chaffing, loose plug boots or terminals, the wires must be replaced. I triple checked for a snug fit and even swapped the wire out with another one but it still does the same thing. Solid-core wires tend to last much longer but should be replaced when their rubber end caps deteriorate — this keeps the wires from arcing over to the engine block. There are ways to tell if you need new spark plug wires. Based on what I've read here, oil-soaked wires tend to cause misfires any any time, not just when the car is cold. The danger may not be revealed quickly. To eliminate the possibility of the coil wire becoming disconnected, route the coil wire under the spark plug wires at the distributor cap. Need replacement Ignition Wires? Order online at 1A Auto & Save Big! We offer a wide selection in aftermarket spark plugs & wire sets for various vehicles. 1 cylinder top spark plug hole. They replaced both coils and replaced my Granatelli spark plug wires with OEM wires. Measure the plug wire's resistance, end to end, with an ohmmeter. Measure the resistance of the spark plug wire with a DMM. DX Highball Series Universal ignition for Fairmont Twin and Single cylinder engines. 0 you DO NOT need to remove the intake, use use a 6" long wobble extension, and a spark plug socket, and a ratchet. The plug wire part of the kit comes with some bright yellow 8. This plug can vibrate loose and cause your problem. Discussion about the “right” way to check spark plug resistance can go on until the cows come home. We'll show you how to test spark plug wires so that you may be able to diagnose or circumvent a variety of problems, including engine misfires and radio static. This terminal block is how the coil element on your stove connects to the inner wiring of your appliance. I will carefully clean the MAF tonight and see if that helps. Their not expensive and maybe its time too put in new plugs, its a cheap place to start, put in NGK’s or Bosch. The arcing still continues, but the car still runs fine. The terminals and boots can be loosely fitted to the wires and then attached to the coil for fitting the coils to the bike. Further information from the customer indicated that the truck misfired the worse in drive, not overdrive, at light to normal cruise around 2000 rpm to 2500 rpm. Some people just pull the plug wires off the non stick coil plugs to test to see if it will stay running on the stick coil plugs but that can damage the main coil by forcing high KV to arc. Turn on the ignition switch and pull the starting cord quickly. I recently purchased a 2002 Rav4 and have been fixing it up. It should be also noted that the precious metal center wires encourage the spark to leave. The spark plug is fouled and shorted to ground or is open and the magneto, which is functioning normally, is unable to fire it. The spark plug wires are connected at the same point in the transformer, so they are being fired at the same time. It may be a precursor to a short circuit or ground-fault, but in and of itself, an arc fault may not shut down either a GFCI or a circuit breaker. Symptoms: My 1991 Camry take about 5 tries to start. The spark in the cylinder at TDC on the exhaust stroke is "wasted," hence the name "waste-spark. Pure silicone rubber is the best insulator but expensive. Spark plug wires (also named "ignition cables") carry high voltage present from your ignition coil(s) for the spark plugs. you are not getting spark. Once you get the socket over the spark plug, place your hand over the head of the wrench, grasping the head firmly and pull the handle, hitting it gently with the palm of your hand to get it going. Tempest Tech-Tip The "right" Way to Check Spark plug Resistors. They most definatly can. The spark plug is fouled and shorted to ground or is open and the magneto, which is functioning normally, is unable to fire it. An engine that has a rough, irregular engine idle is often due to spark plugs that are incorrectly gapped. Plug wires are a possibility, but a resistance test will tell you something between 'jack' and 'shit. The coil output takes the path of least resistance so either a carbon track, a cracked coil, or open circuit voltage meaning the coil output is open from the coil to the plug somewhere is happening and not enough voltage to fire the plugs. Nothing could be further from the truth. At an idle i didnt notice anything. Now, in case you're really curious about how it works, below is a very brief description of how it works: Each COP ignition coil has 2 wires in their connector. My Echo ES-250 Blower isn't running. 054, then regapped those to. The plug may be worn or fouled, causing the misfire. The solution is to replace the spark plug wires, and if the plugs have not been replaced for a while this is good time to install a new set. Check the spark plug type and gap. Reconnect the negative cable to the battery. Once the spark plugs of your BMW start acting up, engine problems usually follow soon after. Know these symptoms to prevent all damages. By "reading" the color of the plug you can tell a lot of things about how the engine is running. As a result, a four cylinder would have 2 coils, 2 plug wires and 2 spark plugs. It sounds like you have High Voltage leaking likely due to a breakdown or arcing within the coil box wood going to #4 spark connection at the box. Resistor core has been the most commonly used suppression type wire. • Check the condition of the charging system. If you own a VR6 its very common for the coil pack to crack and short out. 4) The IAC valve was checked, and there were no problems with this valve. Plug wires may or may not need replacement depending upon mileage, and we recommend replacing carbon-core wires (resistance wires) after about 15,000 miles on older cars. Look and see if there is any physical damage to the wires or boots, like scorch marks and cuts. Will swap plug wires when the reinstall happens. Hello, I have an ´08 Tundra SR5 Double Cab. All colors—blue, red, green, yellow, orange, including neon tones—are available in most diameters, including 7mm, 8mm, 10mm, and more. ) and electrical stresses. If not due to engine flooding, the problem may be a bad ignition cable (excessive resistance, shorted or arcing). The first code is for 2001 and older cars. The plug is an electrical device that gets its power from an. CASE 1: If you got spark from all six spark plug wires. Some of them are surprisingly accessible from the bottom (or even from the wheel well), so jack the car up and check from there with a light. There may be a place where a short circuit is created if the wiring gets damp. 054, then regapped those to. " Each waste-spark DIS coil is hooked in series with its two spark plugs, as shown in Fig. I had a professional diagnose the issue, he said it was a bad coil. The BLUE & GREEN wires bring 12 volts from the switches to the two solenoids on the pump assy. , the ignition coil, the distributor cap, the spark plug wires) are designed to keep moisture out or avoid problems due to moisture. Insure the fuel tank vent tube is not restricted and fuel flows freely to carb, as this happens after riding a bit. Everybody pretty much knows how to do that. The arcing still continues, but the car still runs fine. Also, FireCore50 spark plug wire sets are known to transmit far less electrical interference than others (low resistance and impregnated with ferrite molecular compound used to absorb RFI/EMI). When one of the spark plug wires went 'bad' on my Chevy LS1, the spark plug failing to fire immediately translated to regular vibrations that changed frequency with RPM and became especially bad at idle. They may have become hard or the insulation cracked. During this phase, Saab Trionic is getting its bearings. Ya want the eight page version go read a book. remove the spark plug. 0 you DO NOT need to remove the intake, use use a 6" long wobble extension, and a spark plug socket, and a ratchet. • Remove the distributor cap and carefully check the cap and distributor rotor for faults. • Check the spark plug wires by using an Ohm meter to measure the resistance per foot based on the wire manufacturer's specifications. When an ignition coil develops a problem, typically internal arcing takes place or some of the loops of wire short together. For the ignition coils and cables, there should never be arcing. If any of the other spark plug wires have spark, there is a problem in the distributor cap. New plugs installed last time, vacuum caps capped nice and snug like. " Each waste-spark DIS coil is hooked in series with its two spark plugs, as shown in Fig. Like a patient's thermometer, the spark plug displays symptoms and conditions of the engine's performance. D - Number 7 Plug Wire Rerouting (Fig 8 & Fig 9) Verify that the #7 plug wire crosses over the distributor cap and leaves the distributor cap between the #3 and the #6 tower terminals (Fig 8). If carbon tracking is present, the spark plug will also need to be replaced. Cables and coils of the ignition system should be free of arcing. Loosen each spark plug one or two turns. Engine Misfire. If you have power there, and you aren't getting any spark. This makes your car run rough and can affect your gas mileage. Electrical appliance power cords and extension cords should be periodically inspected for damage or deterioration. With the cowling off, and all lights off around me, I could see arcing around the top right cylinder's spark plug (cyl 2?). Includes two 32" spark plug wires, jumper wire for single cylinder operation, mounting hardware, instruction manual, and wiring terminals. By "reading" the color of the plug you can tell a lot of things about how the engine is running. The secondary side occurs when the voltage is converted to sometimes as high as 20,000 volts within the coil and then delivered to the distributor. When they no longer do so, they are defective and basically need to be replaced (or in the case of a dirty distributor cap, cleaned. OEM Kohler coil with spark plug wires; part # 52 755 48-S. The insulation (rubber coating outside the wire) may break and cause arcing. The most recently reported issues are listed below. Caution: This document contains mixed page sizes (8. Spark plug wires are pretty tough; they don't need to get replaced that often since it has no moving parts. That just means on cylinders that aren't combusting (exhaust stroke), the spark is 'wasted'. Other COP systems use a short plug wire for each cylinder. Most people think of house fires as starting with things such as sputtering grease or overturned candles. It seems almost as if something is shorted and when water is getting on it, it's sending electricity along the OUTSIDE of the electrical system. I will also check the coil pack for arcing. If it looks greenish, then there may be a problem with the coolant. I did verify last. Whether you do a complete tune-up or only change the spark plugs, spark plug wires (also known as ignition cables) should always be checked first. For this style a four cylinder would have four coils and four spark plugs. If you leave the wire open, the spark has nowhere to go, and will try to jump to the metal case and short out internally. That will cause the plugs to retain more heat and cause them to show symptoms similar to those related to lean carburetion. if by coil wire u mean the red wire coming off the dizy that yes its on their secure. This has the effect of reducing the tendency of the wire to act like a radiating antenna. I talked to an MSD tech and was told to separate the green/purple wires from the orange/black wires which were running in the same loom. To eliminate the possibility of the coil wire becoming disconnected, route the coil wire under the spark plug wires at the distributor cap. ) Arcing to Grounds Make sure the spark plug wires are not arcing to any ground plane such as an exhaust manifold, engine bracket, heater hose, etc. Turn on the ignition switch and pull the starting cord quickly. Continue Reading The spark has to be timed so that it sets off the gas at the right part of the piston cycle, usually when the piston is near the top of the cylinder. 10 Common HEI Myths. Contrary to the assertations of the purveyors of brightly colored aftermarket coils, what really determines voltage is the internal cylinder pressure and the plug gap. If you own a VR6 its very common for the coil pack to crack and short out. An arcing plug wire can cause a weak spark or no spark at all in the cylinder with the bad wire. If so, replace the switch. Refer to. Next, check the condition of the spark plugs and spark plug wires (if your engine uses spark plug wires). Since Kia uses the waste spark system that has a coil-n plug for one and three cylinders and wires for two and four cylinders, it is best to inspect the spark plug, plug connectors, and boots. 5mm Super Conductor spark plug wires. Distributor rotation: Counterclockwise. 1L – Inspect the spark plug boot for damage. Do change the plugs on the 2. Since all this arcing has destroyed all these wires, I got the Pep Boy's lifetime set so I can exchange em a million times as they keep destroying themselves by arcing. ELECTRONIC IGNITION SYSTEM. Spark Plug Wires for above È coils. Listed below are 6 common symptoms of worn-out spark plugs or spark plugs that have fouled and need to be replaced by an ASE certified mechanic as soon as possible. I swapped out the coil, but the same issues as stated above remains, including the coil to engine block sparking. The valve cover gasket had failed and I replaced it along with the spark plugs. Continuity checks should be able to be done using the HV wire end and ground. This tells you that the coil pack and the spark plug wires, on your 3. We'll show you how to test spark plug wires so that you may be able to diagnose or circumvent a variety of problems, including engine misfires and radio static. of tightly wound copper for superior conductivity. With additional resistance in a spark plug wire, enough voltage can be lost in that resistance that there is not enough left to jump the gap in the spark plug. Disconnect the spark plug wire from the spark plug. For fine wire iridium plugs, setting the gap is rarely an issue. I'm sure the parts store will be happy to refund your money or at the very least exchange the plugs for the proper Champion brand. So, I had some arcing from the base of my spark plug wires to the block. Mercruiser Plug Wires & Coils, direct replacement tune-up boat parts, distributors, spark plugs, rotor, condensor and other Mercruiser boat parts. So, the higher quality connector, wiring, and shielding will provide more of your spark from the coilpack, to your spark plug. You will want to focus your spray near the boots that attach to the spark plugs to see if any arcing occurs there. When you have a nice strong spark with all four plug wires, and it's still running bad, you might check the ignition timing. ) Further reading: Electric arc Electrical breakdown. Understanding the role of spark plug wires, what the signs of failure are, and how to change spark plug wires will keep your Tahoe ready to hit the road. Their not expensive and maybe its time too put in new plugs, its a cheap place to start, put in NGK’s or Bosch. If you see arcing, you need to change both the plug and the boot. Use a spark plug tester to diagnose if the problem is caused by a spark plug misfire. Diagnosis Testing Tips. On engines with individual coil-over-plug ignition systems, arcing between the coil boot that fits down over the spark plug can short the spark to ground and cause misfiring and wet spark plugs. It may be caused by a spark plug wire or its tip which. , the ignition coil, the distributor cap, the spark plug wires) are designed to keep moisture out or avoid problems due to moisture. ACDelco Professional Spark Plug Wire Sets are designed to match the fit, form, and function found on new vehicles. At an idle i didnt notice anything. If you smell an acrid odor near an electrical plug, then it is an indication that a serious problem could be occurring. The other codes are just examples of codes you might find on a 2002 or newer car. In fact, each foot of finished wire includes 40 ft. Neither the Ignition Cables nor the Coil(s) should have any signs of arcing. so i turned on. Replace them before that happens. Also check the plugwire while its running if you can, in the dark. However, short trips, low speed driving, improper spark plug heat range (too cold), improper timing, or an oil leak in the combustion chamber can cause a spark plug to become fouled. Listed below are 6 common symptoms of worn-out spark plugs or spark plugs that have fouled and need to be replaced by an ASE certified mechanic as soon as possible. An arc-fault circuit interrupter (AFCI) is a circuit breaker* located in your electrical panel that serves the functions of a normal breaker but also senses hazardous arcing on its circuit and will trip off for this. You will want to focus your spray near the boots that attach to the spark plugs to see if any arcing occurs there. I'm sure the parts store will be happy to refund your money or at the very least exchange the plugs for the proper Champion brand. So, I had some arcing from the base of my spark plug wires to the block. You may need to chance the valve cover gasket as well. To learn more about BMW 530xi spark plug issues, read on. and there will be 4 on each side of the engine. Replacing spark plugs and wires are part of a tune-up, so if your spark plugs need to be replaced, you should also consider replacing the spark plug wires. 018 and see if they still foul. Often, when i first start up the Jeep, i will hear an intermittent "snap" that sounds a heck of alot like a loose plug wire arcing to ground. A lower than normal firing voltage in any one cylinder may indicate a shorted plug wire, or a fouled or damaged spark plug. Too black and they could be fouled. Plug wires are a possibility, but a resistance test will tell you something between 'jack' and 'shit. Use Copper Core/Non-Resistor spark plugs gapped at. Spark Plugs: Typically, the gap is re-set on massive electrode spark plugs about every 50 to 100 hours of operation. and there will be 4 on each side of the engine. Mechanic thinks it's pcm. This must always be done or arcing may occur between spark plug wire and metal parts. During this phase, Saab Trionic is getting its bearings. A spark plug wire comes out of each side of the individual coil and goes to the appropriate spark plug. Spark plug wires and spark plugs: All are brand new. If the spark plug wires or ignition coil(s) are bad, the plugs won't fire the air/fuel mixture. The only symptom of a spark that is too weak is a failure to ignite the fuel mixture. Here's How You Diagnose An Engine That Won't Start. If you aren't getting any power there, you will have to start eliminating things Check that and post your findings. Standard: 1. Still, failing or bad spark plug wires share their symptoms with many other engine components going bad. Because the points are wired in parallel with the capacitor,. umm checking the resistance isnt gunna tell you if its good spark plug wire is good it will till you that the wire is somewhat intacked but it maybe as little as one strand of wire. i need help we can not get no spark to our fox helix 150cc we put all new parts and new wire harness and new key switch on it and still no spark from the plug we don’t know nothing else to do we also have a black/red wire from the stator and no were to plug it in to there nothing else i can do for it if you could write me back thank you so. Back then, you didn't just replace your plugs at given mileage intervals. Now slide the air seal all the way up the spark plug boot. If the point dwell is too small, the current will have insufficient time to pass through the primary windings of the ignition coil, resulting in a weak spark. Since the spark may be faint, it may help to do the test in a dark area. By examining the center electrode color, an experienced engine tuner can determine a great deal about the engine’s overall operating condition. this could be from a bad alternator, bad spark plugs, bad spark plug wires, or bad engine coils. Sufficient air may separate the nail from the ground wire to prevent immediate arcing. Also there seems to be a lot of confusion about the causes and corrective actions so hopefully the following will help…. Question: "How can you tell if your spark plugs and wires need to be changed?" (I have spent decades building high performance engines. The spark is large (in brightness, sound, duration, and/or length). 3) Coil #1 generated the misfire code P0301. If the fuel pump starts, it indicates that the fuel pump, power supply to the fuel pump, and wiring from the relay panel to the fuel pump are good. Standard: 1. ACDelco Professional Spark Plug Wire Sets are designed to match the fit, form, and function found on new vehicles. If arcing is found at the boot near the spark plug, turn off the engine and inspect the boots further. Defective spark plug wire leave tell-tale signs of their deterioration, including:. If there is no spark, check for a broken or shorted (bare) lead wire or bad switch. You will be able to see the wire spark in low light conditions. When I tried, it would turn over totally normally, but not fire at all. If the plug wires are really bad, you can see arcing when the engine is running and you're in a dark place The real way to test wires is to get out your multimeter, set it to resistance (ohms) and see what the number is. You have a bad coil or ignition trouble. A spark plug has a metal threaded shell, electrically isolated from a central electrode by a porcelain insulator. You can also lose some spark intensity when you run a coil wire to an external oil-filled coil as the voltage has to travel a longer path, creating more resistance. Other potential issuses include crankshaft seals if it only runs on choke and has floaty idle. Use a spark plug wrench with an extender. Didn't realize it would make that big a difference. Ferret - Thanks for your quick reply! Before I changed the spark plugs, the codes were for misfires on 3 cylinders. I've tried misting my spark plug wires and coil pack, but didn't notice any arcing. Listed below are 6 common symptoms of worn-out spark plugs or spark plugs that have fouled and need to be replaced by an ASE certified mechanic as soon as possible. The coil output takes the path of least resistance so either a carbon track, a cracked coil, or open circuit voltage meaning the coil output is open from the coil to the plug somewhere is happening and not enough voltage to fire the plugs. Only do this if you are sure the ignition wires ARE NOT arcing. The leads on this vehicle were showing signs of age though were within specifications. These driver coils are available as aftermarket items here in the states. Furniture should not be allowed to press against an appliance or extension cord plug when connected to a wall outlet. Insure the pilot jet is clear and you can pass a fine wire through it. The bulb's intense heat can scorch or melt the socket and insulation on the fixture's wires, which increases the risk of arcing — sparks that jump through the air from one wire to another — a chief cause of electrical fires. R&R plug, ignition coil, intake gasket, coolant, manifold, machine work. Use a park plug boot puller to remove the boots. Spark plug wires must usually be inspected if any of those signs and symptoms are present, and when the spark plugs are improved. Use a spark plug wrench with an extender. A common problem on the 1994 to 2004 Mustang V6 models is that the ignition coil pack is prone to failure and can lead to rough running, poor idle, and an unsightly check engine light. "High tension lead" or "cable" is also used for any electrical cable carrying a high voltage in any context. The car will run but I can see that a fat blue spark will fly from the + side of the coil eiher straight back to the strut tower or forward to the metal brace holding the coil. Also, I asked whether the dealership carries the NGK Iridium IX (3764) spark plugs or the NGK Wire Set (TE58) (8916) spark-plug. 3) Coil #1 generated the misfire code P0301. I changed it and the arcing stopped. The extra set of distributor boots are straight in, the benefit being a less crowded situation on the distributor cap, than if I use all 90 degree boots.