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#1 |
Registered User
Join Date: Nov 2016
Location: Richmond Va
Posts: 68
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1984 GMC C60 What went wrong while sitting?
I have a 1984 C60 with a 366 gas engine. Truck ran great when parked a year ago but now is getting no spark. Ideas?
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68 c10- Under construction |
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#2 |
Registered User
Join Date: May 2015
Location: Ridgecrest, Ca.
Posts: 18
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Re: 1984 GMC C60 What went wrong while sitting?
Start by checking the wiring. Make sure rats or rabbits have not chewed the wires.
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#3 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: 1984 GMC C60 What went wrong while sitting?
Make sure the wire from the starter to the coil wasn't eaten.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#4 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,602
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Re: 1984 GMC C60 What went wrong while sitting?
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#5 |
Registered User
Join Date: Jan 2017
Location: Ellicott, CO
Posts: 51
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Re: 1984 GMC C60 What went wrong while sitting?
Distributor cap/rotor contacts may be corroded or oxidized. I'd also check your coil. Could be as simple as a loose ground.
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#6 |
Registered User
Join Date: Jan 2017
Location: Humboldt County, CA
Posts: 19
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Re: 1984 GMC C60 What went wrong while sitting?
Decomposed coil. Most likely corrosion of distro of connectors in the ignition wiring.
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1973 Chevrolet C10 Stepside 454 |
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#7 |
Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,356
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Re: 1984 GMC C60 What went wrong while sitting?
If you have 12 volts at the distributor then it is the module. They can die anytime anywhere, especially after 30 years.
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76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
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#8 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: 1984 GMC C60 What went wrong while sitting?
Corrosion. I'd pull the coil out of the cap and check there, as well as inside the distributor. First try cleaning all that up with Lectramotive. Could be carbon tracks from bad cap.
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#9 |
Registered User
Join Date: Mar 2010
Location: thomastown mississippi
Posts: 1,261
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Re: 1984 GMC C60 What went wrong while sitting?
HEI's are notorious for the rotor buttons going bad.
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#10 |
Registered User
Join Date: Nov 2016
Location: Richmond Va
Posts: 68
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Re: 1984 GMC C60 What went wrong while sitting?
Anyone have a wiring diagram of the wiring coming out of the HEI distributer? This looks a little suspicious.
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68 c10- Under construction |
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#11 |
Registered User
Join Date: Dec 2014
Location: Northern California
Posts: 422
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Re: 1984 GMC C60 What went wrong while sitting?
The battery one next to it is still connected, right? That looks like it may have gone to a tach (tach terminal is next to the battery). Is there any chance it was touching ground? May be your problem right there. Try disconnecting it. Truck should run without it.
After looking again, hard to tell from the picture, but if that runs to the battery terminal of the cap, then that is your problem. It needs to be reconnected to the wire from the ignition. What is that heavy gauge pink wire connected to laying across the manifold? That looks like it should be the batter wire for the HEI. Last edited by nonstop; 02-05-2017 at 01:29 PM. |
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