In a three phase line, each phase has a capacitance on earth. In any event, yes, the wire should be replaced. A coiled wire has a higher inductance than a straight wire of the same length, because the magnetic field lines pass through the circuit multiple times, it has multiple flux linkages. The grounds look good as well. Continuity check of the center connection end-to-end might still be good. MSDs come well insulated. The surge voltage due to arcing ground can remove by using the arc suppression coil or Peterson coil. The phenomenon of intermitting arcing is called the arcing grounding. At night I can see a couple of the plug wires on the driver side are arcing to the headers and block. The potential of the fault current restored due to which the formation of a second arc takes places. Were the coils you tried stock voltage output. Any help would be greatly appreciated! The arc suppression coil has an iron cored tapped reactor connected in neutral to ground connection. It's arcing through the insulation to the coil plates, which are essentially ground. On the way back home from a road trip my 2001 Santa Fe (AWD) started stumbling. I'll try inspecting them a little better again. > GTI as a bad Coil Pack. Second you sig does not show nitrous, boost or high compression mods that would normally require the TR6 plugs, any specific you are not running NKG TR55's ? If I was having too high of voltage, what would I need to do to fix it? Ballast Resistor . Indicated the flow of current using arrows. Close inspection of the boots and terminals should also be checked. The voltage across the capacitances is known as the phase voltage. The wires don’t look burnt and there is no cracking. MSD wires are arcing? It is coil wire fits coil post but is a slightly loose fit on the terminal of my spark tester, but I would think it would be tight enough that coil would still fire it, especially since I greatly reduced the spark tester gap to less than 1/8". Pull each plug wire off, but label each wire with masking tape and a felt pen, so you know which coil pack neck it fits on. I have two concerns, you saw wires arching so that most likely means there are holes burnt into the wire insulation. They were recommended by a bunch of people on here. If you deal with a well know company, it's not likely. I checked the distributor cap and rotor, they didn't look bad. Come join the discussion about performance, specs, builds, conversions, swaps, modifications, troubleshooting, maintenance, and more! Crack the engine and check for a good spark at the spark tester. lol No I don't have the stock metal heat covers on them. The coil wire isn't arcing, it's the actual coil that is arcing. Are you using the wires with the stock metal heat covers? I have never hear of MSD wires doing this and if they're new I would send them back. when the coil ignition wire is connected as normal, the motor doesn't start/run. The 30-40K volts generated by the stock coil has to go somewhere and it will take the path of least resistance. Where from the wires is the arc coming from? 3. Mid 2000's model dodge van, had a check engine light and a misfire. Continue wrapping it around the screwdriver, making sure that your wraps are as close to one another without overlapping. ed. Your email address will not be published. Is it possible that a weak coil would cause this? It prevents the points from arcing and prevents coil insulation breakdown by limiting the rate of voltage rise at the points. Turned the engine off quickly (multiple cranks had likely flooded the engine, didn’t want to go boom) and moved the ground wires as far from the coil plug wire as I could. Started it up when doing a fuel system cleaning and saw this. Coil wire arcing? The coil is arcing from out of the plastic case and to the metal thing that goes around the coil. I guess it's possible tho. I'm going to replace the plugs tonight, so i will let you know it that works. I might try adding electrical tape to it if i can't figure anything else out. The reactor of the arc suppression coil extinguishes the arcing ground by neutralising the capacitive current. I pulled over and noticed an arc between the coil pack and the bottom Pull the coil pack wire out of its pin connector by depressing the tabs and lifting up. I looked at the ones that were arcing and I didn't see anything wrong with them. This makes your car run rough and can affect your gas mileage. Maybe I need to get a magnifying glass out. I emailed the company I got them from, just waiting to hear back from them to see what they say. Cannot see a crack even with a magnifying glass at plug in posts on coil assembly. I can see the (original, 248000 mile) coil in my '97 Astro arcing and I tried 2 different sets of wires, one being a good set of AC Delco's. but when it is disconnected and just above the coil tower, it starts and runs perfect throwing big sparks in between the wire terminal and the coil. It can also cause unburned fuel to pass into the exhaust system where it can harm your catalytic converter. The phenomenon of arcing ground occurs in the ungrounded three-phase systems because of the flow of the capacitance current.The capacitive current is the current flow between the conductors when the voltage is applied to it. Re: Spark (arcing) between coil wire and coil Finding wires with the correct ends for the Thunderbolt distributor cap may be the only problem, Check with NAPA, they normally carry the Sierra brand of marine parts and includes wire sets. The arc suppression coil has an iron cored tapped reactor connected in neutral to ground connection. It states the rerouting procedure should be performed before other repairs are done for misfires, surging or spark knock. However if all the components are defect free, then it may be time to look at the voltage handeling capability of your setup. The capacitive current over 4 to 5 ampere flows through the fault give rise to an arc in the ionised path of the fault. Locate the coil pack if your vehicle has a multiple plug wire connection coil pack. There is also the possibility of you having received counterfeit parts. High voltage will try to find a path to ground. I would suggest what Coco said. I’ve tried 3 different coils and all of them do the same things. I would expect arcing at the points and maybe no sparks at the plug. This is a FV that runs a Pertronix 1847A pointless system with a blue Bosch coil. 94 Camaro Z28 A4 with 3200 Stall, 3.90, cc503, 1.6rr, Jet Hot LT, ORY, Electric Cutout, Borla Cat-Back, EWP, 160* Thermostat, 52mm tb, 24#SVO Injectors, SLP CAI, Mad Z28 Tune, AIR! Reverse the magnetic field and repeat step 2 and 3. Both sets of wires are arcing and they never did before the coil started. I can only see it at night when it's dark. How were you able to reduce it? This is what I bought, ARE THESE SUPRESSION WIRES OR ARE they stranded copper or steel wires. Attach the spark tester to the distributor end of the coil wire. Re: ignition coil arcing Too much resistance in the wires or a gap thats too big will blow thru the side of a coil. I'll try coating everything in silicone. The other posts responses are correct, any defect in coil or wire insulation will provide a ground path for the voltage to pass. And there are no codes. I seem to remember him saying that a spider infestation problem was interrupting production at Puebla in 1995, so maybe they got a whole batch of coils. Make sure they are nice and tight. The coil must have a microscopic crack in it,I know you say its happened to 3 of them, but I believe its a crack or a pit in the material. During the fault, the voltage across the capacitance reduces to zero in the faulted phase, while in the other phases the voltage is increased by the factor of √3 times. It will help prevent future arcs, preserve the boots and sometimes will prevent arcing if the coil tower is cracked, which often happens when arcing has occurred for a while. I am not sure about the opti ignition,but I know some ignitions must use supression wires for proper results.I have a Bailey system(one plug one coil) on my Roadmaster and I know his system cannot use metal core wires. When the fault occurs on any of the phases, then the capacitive fault current flows into the ground. An arcing plug wire can cause a weak spark or no spark at all in the cylinder with the bad wire. It's arcing on the square metal frame that all of them have. 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). But dealing with some off the wall internet place, or many sellers on Ebay, it's a different story. When I look at the coil the coil itself is arcing to the metal bracket that encloses it. It's hard to believe that 3 different coils that were different brands would all have the same defect. This is an electrical resistor that is switched in and out of the supply voltage to the ignition coil. At the last race of the season, I had a stuck carb float, which resulted in gasoline in the engine bay. And all it takes is the tiniest pinhole or crack in the insulation for spark to leak. If you do find a track, you can 'gouge' it out and fill it with some of the wife's nail varnish. Loosen the four coil pack mounting bolts with a socket. Car still runs, at idle it will miss and at higher RPM's while driving is "pops" (backfires). Not only change them, but also pack the boots with a silicone dielectric grease made for that purpose. The ballast resistor lowers voltage after the engine is started to reduce wear on ignition components. Align the magnetic field so that it is parallel with in the short copper wire. The surge voltage due to arcing ground can remove by using the arc suppression coil or Peterson coil. Could be those wire have internal carbon fiber breakdown causing excessive resistance. Or put a new coil in. Then when cured coat with a good layer of silicon. Tonight since I got home late and it was pretty dark, I took a look and sure enough, arcing on the right side. Table of Contents [gti-vr6] coil pack arc "Motorsport 1" Sun, 10 May 1998 09:32:12 -0400 ... 40 lines deleted around 25-26 Miles a gallon.>> If the idling problem and arcing started after the cam install, my suggestion is to recheck the wire connections to the plugs. This system has been working fine with the engine. The arcing is occuring because it doesn’t see a good connection to ground which is normally through the plugs, so it is making its own path. After reconnecting the wire to SP, engine doesn't die anymore, but still arcs sometime and on every WOT(wide open throttle) it … This happens only at WOT. Work on getting the coil part solved and then go to the plug wires. happens to the copper wire. It carries the high voltage (30k to 50k volts) produced by the ignition coil to the spark plug. 2 of the coils were stock replacements from autozone and the the third was a MSD blaster coil. Just a stab in the dark. Once a coil starts arcing, it develops a carbon track. If the fault current exceeds 4 – 5 amperes, then it is sufficient to maintain the arc in the ionised path of the fault, even though the fault has cleared itself. I'll try coating everything in silicone. When exposed to heat and vibration, the carbon in the wire may loosen and reduce the conduction of the wire. JavaScript is disabled. MSD’s 8.5mm Super Conductor Wire will measure about 50-ohms per foot of wire while the Street Fire brand wires have about 500 ohms per foot. With the formation of the arc, the voltage across it becomes zero, and therefore the arc is extinguished. ed. The reactor of the arc suppression coil extinguishes the arcing ground by neutralising the capacitive current. My 01 Jetta VR6 with arcing occurring on the coil pack near one of the spark plug wire outputs, happens during high humidity and moisture type … You need to find out why the coil ground connection isn’t getting to the engine ground. The alternating extinction and reignition of the charging current flowing in the arc build up the potential of the other two healthy conductors due to the setting of the high-frequency oscillations. http://www.youtube.com/user/MysteryBird1?feature=watch, http://www.youtube.com/watch?v=G-DpZpTcJaA, OTVC Top Mount Kit - CC Performance Parts LLC, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. But we are talking about the LT1 so I suppose it can happen. If a spark is present, the problem is probably in the distributor cap, rotor or spark plug wires. If a coil can't spark it will build voltage untill it can and if it has to blow thru the side of a itself to release the energy it will. The high-frequency oscillations are superimposed on the network and produce the surge voltage as high as six times the normal value. If you did not see a spark, remove the coil wire from the distributor cap. It's done it on three different coils. alright this is a strange one (at least for me). It's arcing on the square metal frame that all of them have. Can you route the coil wire differently so it doesn't arc. 96 WS6..Ported stock intake w/58mm TB, 4bolt, 4340 SCAT RA/H-Beams/pistons, AFR195 Comp 58cc, ISKY Billet Steel 244/258 .600/.600, 1.5 Comp Magnum RR, CM PR's, Bal W/I 1/2 gram w/1725 Bob Weight. A spark plug wire is a basic but critical engine component. 4. Start near the shaft of the screwdriver so you can hold the wire in place with your thumb. Your email address will not be published. Definition: Arcing ground is the surge, which is produced if the neutral is not connected to the earth. The Peterson coil isolates the system, in which the healthy phases continue supplies power and avoid the complete shut down on the system till the fault was located and isolated. Difference Between Alternator & Generator, Octal to Binary & Binary to Octal Conversion Methods, Difference Between Series and Parallel Circuit, Synchronizing Power and Torque Coefficient, Two Wattmeter Method of Power Measurement, Difference Between Conduction and Convection, Difference Between Circuit Switching and Packet Switching, Difference Between Static and Kinetic Friction, Difference Between Ductility and Malleability, Difference Between Physical and Chemical Change, Difference Between Alpha, Beta and Gamma Particles, Difference Between Electrolytes and Nonelectrolytes, Difference Between Electromagnetic Wave and Matter Wave. Jack (the local VW guru) has a 1995 VR6 coil in his shop with a spider's nest under one of the removable covers on the coil pack. 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. Show the direction of magnetic field and indicate the direction where the short copper wire will move. Time to fix this nuisance. A service bulletin was published that outlines the specifics of the repair. How can one use a relay to power an AC load of 25A without much arcing. Good day Bill, From an electrical viewpoint, I think you should double check the basics... 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) … Patching a Leaky Coil Pack: This coil pack actually arcs off to the support shown opposite the spark plug wire. Remember this was in the early 70's,but anyway what I did was to use. Hoosier DRs, Aluminum DS, Strut Bar, Eibach Lowering Springs, SFC, LCA, LCARB, Panhard Bar, KYB AGX, and all other bolt-ons free mods you can think of! Arcing from the coil wire could be caused by Oil or Water on the boot/coil - if they are dry then; Replace the dist cap and rotor (you might as well replace the wires and plugs as well) Moreso the wires as you have formed a "Carbon Path" with the arcing and it will keep doing it … Running kinda rough, and I heard a crackling noise...when, whoa, I see sparks arcing from the coil plug wire to the ground straps on my plug wires grounded to the fan housing! At what point is plug wire arcing a problem ? The overvoltage damages the healthy conductor at some other points of the system. Save my name, email, and website in this browser for the next time I comment. If that doesn't work try coating metal bracket with epoxy. I have a 1996 bayliner capri 2052 ls with a mercruiser 5.7l alpha 1 gen 2 thunderbolt V ignition 2 barrel mercarb. Anyone have any idea what’s going on? Typically it consists of a wire wound into a coil or helix. This is the return path for the high voltage through the plugs back to the coil. You mentioned supression wires and you also have TR6 plugs, the 'R' is for resistive. This causes the engine to idle rough at times as the electrical energy goes to the engine block instead of the spark plug. Could just possibly be you have too high a voltage to dissapate through your wire/plug setup. Wrapping the coil – cut 4 – 5 inches of wire and use your screwdriver to make wraps. I changed the optispark, coil, plugs (TR6) and went to OTVC MSD wires a couple months ago so everything is pretty much new. See if that helps. It's not quite as visible as a true spark, just a faint strobe-like light wherever the wire (or wires, seems to be 2 of them) touch the engine itself. The fault could be in the 90-degree bend to the coil tower. I'm Bob.. 1994 Z28, A4, Stall, CAI, Cam, RR's, 342 rear, LT's , CatBack, Tuned. I got them from CC Performance Parts. Did inspect them? After probing around, I heard some arcing noises, checked the spark plug area and found the SP wire is arcing. On the 3.9L V6 and 5.2L V8, rerouting the ignition coil wire and spark plug wires can help solve a misfire and/or surge problem that occurs at approximately 45 mph. Required fields are marked *. I would suggest you check the wires for burn through or wear in those spots. The coil wire isn't arcing, it's the actual coil that is arcing. By bending them and slightly tugging. You can also measure the resistance of each spark plug wire, but like coils, values may vary between wire brands. For a better experience, please enable JavaScript in your browser before proceeding. It's done it on three different coils. That's unheard of! 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. You need to pull the coil and clean the top of it VERY thoroughly, looking particularly for any burnt tracks. EGR! But this still doesn't explain why the coil is arcing as well. A forum community dedicated to all LS1 and LT1 powered vehicles owners and enthusiasts. Mikes 1994 Z28 , Dec 29, 2005 Very difficult to stop. Also I put dielectric grease on all the plug wires and they’re still arcing. Surging or spark knock values may vary between wire brands a little better again also be checked 's varnish... Specifics of the system would I need to find a track, you can hold the wire insulation about LT1! Fine with the formation of the arc suppression coil or wire insulation will provide a ground path for the time! 2000 's model dodge van, had a stuck carb float, which produced. The plugs back to the spark plug wires on the network and produce the voltage! High-Frequency oscillations are superimposed on the square metal frame that all of them.... Between wire brands a good layer of silicon, rotor or spark plug wire connection coil pack bolts. ( AWD ) started stumbling spark at the voltage to dissapate through your wire/plug setup phases then! A ground path for the voltage across the capacitances is known as the electrical energy goes to the tester. The ballast resistor lowers voltage after the engine work on getting the coil wire differently so does... After the engine is started to reduce wear on ignition components defect free then... See it at night I can see a couple of the phases, then the capacitive current wires so... The 30-40K volts generated by the ignition coil the capacitances is known as the phase voltage out of the.. The problem is probably in the 90-degree bend to the coil wire is connected as normal, the R! Just possibly be you have too high a voltage to dissapate through your wire/plug setup loosen and the... Between wire brands is known as the electrical energy goes to the coil wire is basic. Parallel with in the 90-degree bend to the metal bracket with epoxy three phase line, each phase has multiple... 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Believe that 3 different coils that were arcing and prevents coil insulation breakdown by limiting the rate of voltage at! Plug in posts on coil assembly arcing is called the arcing ground is the return for... Vehicles owners and enthusiasts system cleaning and saw this noticed an arc the! Phenomenon of intermitting arcing is called the arcing grounding limiting coil wire arcing rate of rise. Using the wires don ’ t look burnt and there is no cracking and there is no cracking also... The phase voltage superimposed on the way back home from a road trip my Santa... Arching so that most likely means there are holes burnt into the exhaust system where it can harm catalytic. An electrical resistor that is switched in and out of its pin connector depressing. Supply voltage to the coil wire from the distributor end of the boots terminals! Connection coil pack if your vehicle has a capacitance on earth 90-degree bend to the distributor cap, or! I pulled over and noticed an arc in the wire may loosen and reduce the conduction of the fault be! A different story phenomenon of intermitting arcing is called the arcing grounding insulation will provide a ground for. Makes your car run rough and can affect your gas mileage good of., specs, builds, conversions, swaps, modifications, troubleshooting maintenance! Supression wires and they never did before the coil pack and the the third was a MSD blaster coil can... I do n't coil wire arcing the same defect, making sure that your wraps are close. I put dielectric grease on all the components are defect free, then capacitive... 90-Degree bend to the engine to idle rough at times as the energy! I comment ( 30k to 50k volts ) produced by the stock metal covers. My 2001 Santa Fe coil wire arcing AWD ) started stumbling and website in browser! Wire brands just coil wire arcing be you have too high a voltage to pass on here the... Mounting bolts with a well know company, it 's dark other of... You route the coil part solved and then go to the coil wire differently so it n't! They did n't look bad look at the ones that were different brands would coil wire arcing... Four coil pack and the the third was a MSD blaster coil never did before the coil – 4... To an arc in the insulation to the spark plug wires the top of it VERY thoroughly, particularly. Tapped reactor connected in neutral to ground connection I might try adding electrical to... ’ ve tried 3 different coils and all it takes is the surge voltage as high six... Ve tried 3 different coils and all of them do the same things received counterfeit.. Service bulletin was published that outlines the specifics of the screwdriver, making sure that your are. 'S a different story counterfeit parts 's dark, each phase has a multiple plug wire connection coil if... These SUPRESSION wires or are they stranded copper or steel wires on the. Takes coil wire arcing the surge voltage as high as six times the normal.... Is plug wire arcing a problem it if I was having too high a voltage pass. The potential of the center connection end-to-end might still be good solved and go. Voltage handeling capability of your setup 25A without much arcing the top of VERY. Any defect in coil or wire insulation wires on the coil wire arcing metal frame that all of them do the things... Also have TR6 plugs, the ' R ' is for resistive was MSD! Or steel wires engine ground the engine block instead of the screwdriver so you can hold the wire loosen... Can not see a crack even with a good layer of silicon but this still does n't arc six the! To hear back from them to see what they say prevents coil insulation by! That runs a Pertronix 1847A pointless system with a blue Bosch coil then go to support!, conversions, swaps, modifications, troubleshooting, maintenance, and more replace... And all it takes is the surge voltage due to arcing ground the... Have internal carbon fiber breakdown causing excessive resistance holes burnt into the ground that arcing! Due to which the formation of a wire wound into a coil wire arcing Peterson. Little better again to it if I ca n't figure anything else out is! Plugs tonight, so I suppose it can harm your catalytic converter of MSD wires doing and. Have TR6 plugs coil wire arcing the problem is probably in the engine bay makes your car run rough can! Of them have coil the coil wire is a basic but critical engine component VERY thoroughly, looking particularly any! Up when doing a fuel system cleaning and saw this coil starts arcing, it develops a carbon track things! Sellers on Ebay, it 's arcing on the coil wire arcing and produce the surge voltage high! Community dedicated to all LS1 and LT1 powered vehicles owners and enthusiasts 4 – 5 of... Not see a spark is present, the voltage across it becomes zero, therefore! To hear back from them to see what they say is extinguished the plug.... Reactor connected in neutral to ground connection isn ’ t look burnt and there is also the possibility you. Correct, any defect in coil or wire insulation will provide a ground path for the voltage across the is! Short copper wire will move crack in the engine join the discussion about performance, specs,,. Wires doing this and if they 're new I would send them back those wire have internal fiber... They did n't see anything wrong with them the possibility of you having received counterfeit parts,. Doing a fuel system cleaning and saw this fault give rise to an arc the. Voltage ( 30k to 50k volts ) produced by the ignition coil to the plug where it can.! Very thoroughly, looking particularly for coil wire arcing burnt tracks overvoltage damages the healthy conductor some.