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lbholt
New User
Oct 28, 2006, 10:26 AM
Post #1 of 6
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I have a 1986 Chevy GMC,motor size 350.I have replaced plugs,wires,rotor,cap,module,and coil.When I start up the coil
archs and takes the module out.Can anyone help me figure out
what I should do to fix this problem? Thanks,Larry
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 28, 2006, 10:47 AM
Post #2 of 6
(3071 views)
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Re: coil is arching
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Not sure how you figured that out with the coil in the cap but probably would just replace it and the cap and rotor, T OOPS - somehow didn't see that you had replaced cap and rotor
(This post was edited by Tom Greenleaf on Oct 29, 2006, 11:06 AM)
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lbholt
New User
Oct 28, 2006, 10:51 AM
Post #3 of 6
(3070 views)
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Re: coil is arching
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Tried that 4 times,and still same thing.Thanks for your reply.
Larry
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 28, 2006, 12:41 PM
Post #4 of 6
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Re: coil is arching
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From here I would check the distrutor's shaft bearings. I'ts never happened to me on the HEI but if it can wobble around a lot it might be able to make erratic sparks. I haven't found a local rebuilder for one I need done in a 1948 tractor and haven't asked yet if I can just get one rebuilt.
For the Chev HEI they probably aren' t that expensive anymore. Good luck, T
(This post was edited by Tom Greenleaf on Oct 28, 2006, 12:54 PM)
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way2old
Veteran
/ Moderator
Oct 28, 2006, 4:24 PM
Post #5 of 6
(3066 views)
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Re: coil is arching
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Is the grounding rang still in the cap? Sounds like the system is looking for a ground and is grounding through the shaft.
Being way2old is why I need help from younger minds
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steve01832
Veteran
Oct 29, 2006, 6:17 AM
Post #6 of 6
(3063 views)
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Re: coil is arching
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Sounds like way2old hit the nail on the head. When you remove the coil, there should be a round rubber gasket with a metal rod and spring under it. If it is there replace the rubber gasket. Also, there should be a ground clip under the coil that plugs into the connector at the distributor. If it is gone, replace that also. The only other thing I can see is maybe a faulty ignition coil insulator housing. If that's the case, try another brand coil. Preferably a Delco.
Steve
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