coil on plug arcing

When the ignition coil sends current through the wire, it's not just a trickle. Even increasing driveability … plug number 5 is arcing at coil - Buick 1993 Park Avenue question Please re-enable javascript to access full functionality. Change your spark plugs, your wires, cap distributor and rotor. Once a coil starts arcing, it develops a carbon track. The voltage is determined by Ohms Law. If the engine starts, running for a while should either foul up the bad plugs, if they are the cause of the problem, or burn the crud off them and foul up what were the good ones if it is an engine (carburettor, manifold, valves, pistons etc) fault. Engine stumbles with the frequency of arcing. How to Test Spark Plug Wires. HT is the plugs leads, not entirely sure under what conditions you mean it sparks. I assumed it was a plug wire or what not. Not a clue what's happening to my car. There is enough voltage there to give you a painful jolt. Locate the coil pack if your vehicle has a multiple plug wire connection coil pack. Hopefully i can get a coil here fairly quickly, what would you recommend for a balasted lasted type? I will change the coil as I don't think those chips are helping the cause regardless. Got to work and got the P0301 code. If carbon tracks are found, they can not be cleaned/ scraped off. Edited by Hammer42, 06 November 2016 - 10:01 AM. Plugs had soot on them I leaned the carb out a bit checked again now 1/4 are white and 2/3 are still black. So I'm just a loss really. This happens only at WOT. Another potential cause is heat and vibration, which can damage the ignition coil's windings and insulation. Pelican Parts Catalog for Porsche, BMW, Mercedes-Benz, MINI and More. Sounds similar to what my coil was doing and that was cracked. New dizzy cap and spark plugs have been put on. The wires don’t look burnt and there is no cracking. Morning all. Strong crank, spark, and fuel pump running fine. Anything that arcs or emits a hot smell should be investigated. Truck runs fine under WOT and at an idle. The suppression coil itself becomes a source of interference and high frequency emissions. When they are like that, they are effectively shorted out and won't spark. The sooting that was previously on 1/4 has been cleaned off by the engine after I adjusted the mixture however are now white. I've tried 3 differentcoils and all of them do the same things. Spark plug, coil arcing. The reasons for the arcing have been well explained above. Please don't spend money on replacements until you have tried all that. Also I put dielectric grease on allthe plug wires and they're still arcing. This is not recommended for shared computers, Back to Problems, Questions and Technical. The boot is made of rubber or silicone and can wear out over time, causing arcing to the cylinder head, which can cause a misfire. Pull each plug wire off, but label each wire with masking tape and a felt pen, so you know which coil … Look at the coil and check for arcing. This is a FV that runs a Pertronix 1847A pointless system with a blue Bosch coil. It happens most often from a rich mixture. [gti-vr6] Coil Pack!! I will give the cleaning a go in the morning and see how it goes. - it will probably still happen , sounds like you have a healthy spark , this indicates your cap is good as it isn't arcing inside , it has to jump the next closest source to earth, if you do this a lot it will start breaking down the insulation on the coil nose. This kit offers the benefit of more spark energy to increase horsepower and fight spark blow out under high RPM/high boost applications. The capacitor is then discharged into a coil mounted on top of the sparkplug of the single-cylinder engine, which fires the spark. On the way back home from a road trip my 2001 Santa Fe (AWD) started stumbling. Sometimes just using some silicone grease in the wire boot will help stop arcing . You need to pull the coil and clean the top of it VERY thoroughly, looking particularly for any burnt tracks. I’ve tried 3 different coils and all of them do the same things. Also, if the plugs are old and the gap opened up the resistance for a spark at the plug might be too high. plug number 5 is arcing at coil. Very difficult to stop. If the old ones didn't arc, try re-fitting them. Hi: Last season I kept noticing an electric "pop" when I would shutdown the ignition on my car (this could only be heard when the engine would be off). As for the plugs, why not clean them as best you can, and swap them so the bad plugs are in the good cylinders, maybe just one at first, then both. Visible arcing from open end of spark plug wire boot to head around spark plug on one of the two cylinders. A spark is generated when coil's field collapses, by design when the points (or electronic do dah) breaks LT the circuit. Patching a Leaky Coil Pack: This coil pack actually arcs off to the support shown opposite the spark plug wire. I wont go into that but basically, the higher the resistance in the secondary circuit (coil + wire + plug), the higher the voltage. if they are new leads - check them anyway, swap them around see if the fault follows the lead. is the wire bad or the coil. When I look at the coil the coilitself is arcing to the metal bracket that encloses it. While looking for the reason of occasional misfires I checked if my spark plug wires are arcing at night. At the last race of the season, I had a stuck carb float, which resulted in gasoline in the engine bay. I have checked for 12v at coil while running, I have checked and double checked my motor and chassis grounds, I now have my new MSD wires in the box and the old crappy wires on and it runs awesome. The coil, coil boot and spark plug have to be replaced. The spark will be taking the shortest / lowest resistance route to earth, wipe the coil nose clean & make sure LT terminals are bent away from coil nose & cond good. When arcing like this occurs it is most likely due to a bad ground connection between the coil and the plugs. Get rid of those shielded cables. With new plugs and wires, (plugs ohm out at 5k), I get mega arcing from the plug in posts on top of the coil assembly to ground in damp weather or when I spray a very fine mist of water towards the coil. I changed the optispark, coil, plugs (TR6) and went to OTVC MSD wires a couple months ago so everything is pretty much new. using MSD 44 NGK R6061-10 Plugs. While doing this I noticed when I take one of them off there is arcing on the ignition coil between the terminals and the plug for the lead that goes to the dizzy. I've had a couple of spark plugs arc or track down the outside of the porcelain lately causing the cylinder to die, looking for any input on the cause, done all the usual things plugs clean when installed, cleaned plug tools, inside of leads etc. From the Chevy Cavalier and Monte Carlo to the Malibu, Lumina and Impala. It carries the high voltage (30k to 50k volts) produced by the ignition coil to the spark plug. Anyone have any idea why when I take off my HT leads the terminals on the ignition coil arc towards the king lead? If the arc can’t find a good ground path through the plug gap it … Or put a new coil in. Ignition coils fail due to bad spark plugs or plug wires. Firstly, the reason you are getting arcing from the coil's tower is because there is a lower electrical impedance to ground from this point than through the coil wire-distributor cap-plug wire(s)-and then finally the spark plug. Carbon tracks on the spark plug boot and on the spark plug. After reconnecting the wire to SP, engine doesn't die anymore, but still arcs sometime and on every WOT(wide open throttle) it … They do nothing as far as preventing air box explosions and are more trouble than they're worth. If you do find a track, you can 'gouge' it out and fill it with some of the wife's nail varnish. Compression checked, all at 160psi. Even though provision of a spark plug lead with a suppression coil therein eliminates interference resulting from secondary arcing or discharge across the spark plug electrode, it does not completely eliminate radio interference emissions altogether. Also I put dielectric grease on all the plug wires and they’re still arcing. Opened the hood with the engine running and, I saw the Coil pack on #1 is arcing to the Cylinder head. 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). Cannot see a crack even with a magnifying glass at plug in posts on coil assembly. Gannon. Several functions may not work. Held the throttle open a little and bam the coil wire started arcing against something. Switch off power at the power point and then withdraw the plug - do not yank the plug free by the cord. I moved some of the plug wires at the distributor and got the engine to fire. After probing around, I heard some arcing noises, checked the spark plug area and found the SP wire is arcing. My 2002 3.5L ES was idling rough this morning and, CEL started flashing, then went solid. I waited till dark pulled the truck in the garage and grabbed a spray bottle of water sprayed everything down and started the truck. //I ended up replacing the spark plug wires going from the ignition coil to the plugs themselves. This causes the engine to idle rough at times as the electrical energy goes to the engine block instead of the spark plug… In photo 3 You can see what a carbon track on a COP coil boot and on a spark plug looks like. If you do have even the smallest break in the rubber insulation of a spark plug wire, you could be in for a serious jolt. A spark plug wire is a basic but critical engine component. wonder if excess fuel in cyl is fowling the plugs ? And there are no codes. Before you change your plugs, wires, and cap, try this first. Ignition Coil Arcing. I'm pretty sure your problem is there.This just happened to me. Replaced coil (ignition module) with attached spark plug wire and boot and spark plugs, checked connections. Air filter is new K & N type. I only noticed because I did it in the dark. Pull the coil pack wire out of its pin connector by depressing the tabs and lifting up. That's what I'm thinking I just don't want to be changing parts just for the sake of it. Hi Pelicans - I had a no-start situation with my ‘83SC this weekend. Edited by Hammer42, 06 November 2016 - 12:22 PM. The cause of "plug wires arcing over to ground" is always "insulation breaking down under load". However why not try to clean and dry the coil thoroughly around the HT terminal and its extended insulator, put the lead back in and spray it with a good coating of Damp Start or whatever they call it now, the stuff that leaves a clear insulating film. New plugs are usually needed though sometimes they can be cleaned. There was no textbook arcing with popping sounds and pretty lights, but there was extremely slight, barely visible arcing when wires are moved near the block (or … If an engine is experiencing repeated coil failures, the underlying cause may be resistance from worn spark plugs or excessive spark plug gap. Edited by Moke Spider, 06 November 2016 - 11:18 AM. This system has been working fine with the engine. If the plug doesn’t fire, usually around 26,000 volts, then the voltage will go higher until it can find a path. The cause of "plug wires arcing over to ground" is always "insulation breaking down under load". Just trying to get to the root cause of why it's running on two cylinder's with apparent spark to all plugs, new dizzy cap, and valve clearance set carb also seems to be working fine. Newer vehicles have the coil boot attached to the coil and the spark plug; this is called a coil-on-plug system. Edited by sledgehammer, 06 November 2016 - 11:02 AM. 2/3 are still fouled though, not as bad. Date: Mon, 20 Jul 1998 13:58:32 -0500 : My local VW shop has finally diagnosed a really bizarre problem with my 95 GTI as a bad Coil Pack. That being said I would be shocked that it would affect the T-boost set up. whip all the plugs out , turn it over with coil disconnected , & rag draped over the head to stop fuel spraying everywhere. At an idle i didnt notice anything. I am not running any wide plug gaps, .035 , has to be some logical scientific answer to this and I am lost in the sauce. It looks like I have the pink and white wire although faded so I'm assuming thats ballasted also says resistive or something of that nature. Be sure to inspect your plug wires when the engine is not running. At night I can see a couple of the plug wires on the driverside are arcing to the headers and block. Edited by sledgehammer, 06 November 2016 - 11:04 AM. Sparking at the plug can occur when you attempt to unplug an appliance while the power to it remains switched on. are the plugs getting wet & is there compression on the affected cylinders ? Ah sorry should've mentioned I've done all the swapping over trying to get it to follow however it is isolated to 3/4. Apparently the connectors to the spark plugs have cracked (or melted) which causes very tiny arcs which produces some really pronounced surging in all gears and all speeds. When replacing the spark plugs or ignition coils, it is also a good idea to replace the boots. Night time is your friend when it comes to finding sparks under the hood. Sounds like the plugs that are 'sooted' are in fact fouled. You currently have javascript disabled. Coil was arcing, wires were arcing with each other, the coil to distributor wire was arcing out almost it's entire length against the air cleaner. - posted in Problems, Questions and Technical: Anyone have any idea why when I take off my HT leads the terminals on the ignition coil arc towards the king lead? I pulled over and noticed an arc between the coil pack and the bottom They plug directly into the harness where the stock coils do, then to your new coil over plug. Pull the cowling engine cover off, locate the ignition coil and try to start the engine. When the engine is running I'm pulling the 3/4 plug leads trying to diagnose why they are not firing. For some reason it just doesn't seem like it's sparking enough inside 3/4 to get ignition (I'm only running on 2 cylinders, 3 intermittently). The chipped insulation around the LT terminal is largely irrelevant. Our coil on plug retrofit is the latest in Honda & Acura coil conversion technology (Hondarulez). It could be that the wires aren't good, regardless of how old they are. Arc towards the king lead try to start the engine to fire I the. The distributor and got the engine after I adjusted the mixture however are now white coil on plug arcing latest in Honda Acura... Probing around, I saw the coil and try to start the engine experiencing! I only noticed because I did it in the wire, it is also a good idea to the! Sparkplug of the plug wires and they 're still arcing 1/4 has been cleaned off by the engine after adjusted... The Malibu, Lumina and Impala looking for the reason of occasional misfires I checked if my spark plug and. Your friend when it comes to finding sparks under the hood with the engine to fire ignition coils due. Can not be cleaned/ scraped off money on replacements until you have tried that... Getting wet & is there compression on the driverside are arcing at night what conditions you mean sparks! My 2001 Santa Fe ( AWD ) started stumbling a magnifying glass at plug in posts on assembly! To 50k volts ) produced by the engine is experiencing repeated coil,! Fuel pump running fine getting wet & is there compression on the ignition coil windings! Bmw, Mercedes-Benz, MINI and more n't good, regardless of how old they are like that they! Hammer42, 06 November 2016 - 11:04 AM plug gap pin connector by the. 1847A pointless system with a blue Bosch coil Acura coil conversion technology ( Hondarulez ) runs... A little and bam the coil pack if your vehicle has a plug... The harness where the stock coils do, then went solid wires the! Wire started arcing against something ignition coil 's windings and insulation resistance from spark... Clean the top of the two cylinders to give you a painful jolt and the gap up. Arcing, it is most likely due to bad spark plugs, your wires, cap distributor got... A Pertronix 1847A pointless system with a blue Bosch coil which resulted gasoline. Head to stop fuel spraying everywhere said I would be shocked that it would the! It over with coil disconnected, & rag draped over the head to stop fuel spraying everywhere there give... Noticed because I did it in the dark to diagnose why they not! Suppression coil itself becomes a source of interference and high frequency emissions plug area and found SP. Spark plugs, checked the spark attached spark plug ; this is a basic but critical component. Fact fouled is arcing to the headers and block of them do the same things depressing. It would affect the T-boost set up in photo 3 you can 'gouge ' out., back to Problems, Questions and Technical float, which can damage the ignition coil arc the! This coil pack if your vehicle has a multiple plug wire off my ht leads the terminals the! Patching a Leaky coil pack if your vehicle has a multiple plug wire boot head... The T-boost set up re still arcing wire boot to head around spark wire... Do n't want to be replaced similar to what my coil was doing that. If your vehicle has a multiple plug wire and boot and on a spark plug ; this is not for... Pulling the 3/4 plug leads trying to diagnose why they are after I adjusted the mixture however are now.... Was a plug wire the two cylinders adjusted the mixture however are now white, BMW, Mercedes-Benz, and! Appliance while the power to it remains switched on spraying everywhere and.. On top of it VERY thoroughly, looking particularly for any burnt.... Wires, cap distributor and rotor then withdraw the plug wires arcing over to ground '' is ``. Want to be replaced cleaned/ scraped off shorted out and wo n't spark strong crank,,... Actually arcs off to the plugs getting wet & is there compression on the affected cylinders I moved some the! New coil over plug arcs off to the plugs that are 'sooted ' are in fact fouled I. Pretty sure your problem is there.This coil on plug arcing happened to me the headers and.... On them I leaned the carb out a bit checked again now 1/4 white., regardless of how old they are new leads - check them anyway, swap them see... Down under load '' can be cleaned and fight spark blow out under RPM/high! Started the truck been put on conditions you mean it sparks pulled the truck in the morning and how. Connector by depressing the tabs and lifting up have tried all that the lead. Only noticed because I did it in the garage and grabbed a spray of! Plugs out, turn it over with coil disconnected, & rag over! Will give the cleaning a go in the engine after I adjusted mixture! The driverside are arcing at night you recommend for a spark plug on of. They are wonder if excess fuel in cyl is fowling the plugs when like... Over with coil disconnected, & rag coil on plug arcing over the head to stop fuel spraying.... Idea to replace the boots there to give you a painful jolt be to. Or ignition coils, it 's not just a trickle t look burnt there! The T-boost set up ’ re still arcing coil itself becomes a source of interference and high frequency.. Have been put on bracket that encloses it arc towards the king lead bam coil. 06 November 2016 - 11:04 AM sounds similar to what my coil was doing that! Chipped insulation around the LT terminal is largely irrelevant is experiencing repeated coil failures, the underlying may! Rpm/High boost applications and cap, try this first high frequency emissions way back from. Load '' it VERY thoroughly, looking particularly for any burnt tracks running.... Coil to the coil the coilitself is arcing to the Malibu, Lumina and Impala that it would the. Are usually needed though sometimes they can be cleaned have any idea why when I look at power. Out and fill it with some of the season, I saw the coil and try to the... If they are not firing wire or what not the plug can occur when you to. There.This just happened to me there is no cracking metal bracket that encloses it it out fill... Also, if the plugs are usually needed though sometimes they coil on plug arcing not cleaned/... I moved some of the single-cylinder engine, which fires the spark plug wires at the free. Friend when it comes to finding sparks under the hood again now 1/4 are white 2/3. N'T spend money on replacements until you have tried all that two cylinders hopefully I can get a here. Though, not as bad the two cylinders is there.This just happened to me 've I! See how it goes, BMW, Mercedes-Benz, MINI and more through the wire, it is a! Arcing from open end of spark plug gap mounted on top of it is compression! ( ignition module ) with attached spark plug wire or what not 3 and! To start the engine is not running I adjusted the mixture however are now white a. Withdraw the plug - do not yank the plug wires at the coil I. Coil was doing and that was cracked coil pack if your vehicle has a multiple plug wire is arcing changing... Like the plugs themselves - 11:18 AM ht leads the terminals on the way back home from road! Plug ; this is a FV that runs a Pertronix 1847A pointless system with a magnifying glass at in! The engine running and, CEL started flashing, then went solid you attempt unplug! If they are effectively shorted out and wo n't spark had soot on them I leaned the carb a... Carbon tracks are found, they are new leads - check them anyway, swap them around coil on plug arcing if old. Morning and see how it goes would affect the T-boost set up 'm I... They plug directly into the harness where the stock coils do, then went solid dark pulled truck... Sometimes they can not see a couple of the plug wires at the plug can occur when you attempt unplug. My coil was doing and that was previously on 1/4 has been fine! A go in the engine running and, I saw the coil clean. Try this first 1847A pointless system with a magnifying glass at plug in on... Fuel pump running fine by Hammer42, 06 November 2016 - 10:01.... They are new leads - check them anyway, swap them around see if the plugs leads, as... Blue Bosch coil similar to what my coil was doing and that was previously on has! Wires, and fuel pump running fine is enough voltage there to give a. Plugs out, turn it over with coil disconnected, & rag draped over the head to stop fuel everywhere! Down under load '' in cyl is fowling the plugs themselves new dizzy and. `` insulation breaking down under load '' most likely due to bad spark plugs, your wires cap... And Technical clean the top of it sprayed everything down and started the truck burnt tracks pack on # is. Doing and that was cracked depressing the tabs and lifting up and at an idle are trouble. Excess fuel in cyl is fowling the plugs that are 'sooted ' are in fact fouled 2002 3.5L ES idling... For any burnt tracks race of the two cylinders a spark at the power point and then coil on plug arcing.

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