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1984 Chevy Silverado No fire to Sparkplugs from Distributor

Tiny
DOOWOPMAC
  • MEMBER
  • 1984 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 84,000 MILES
THe truck was running fine except used to much gas. Changed sparkplugs, still fine. Changed distributor cap and rotor button, lost fire to the plugs. Changed coil and ignition module, still no fire to plugs. One last item to change, is the condensor. I even replaced the distributor with another one still can't get fire to the plugs.
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Sunday, July 4th, 2010 AT 9:00 AM

15 Replies

Tiny
JIM SHIRRON
  • MECHANIC
  • 77 POSTS
Do you have fire to the distributor itself?
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Sunday, July 4th, 2010 AT 9:06 AM
Tiny
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Yes
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Sunday, July 4th, 2010 AT 9:11 AM
Tiny
JIM SHIRRON
  • MECHANIC
  • 77 POSTS
Check to be sure you have it when you're cranking as well as ignition on
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Sunday, July 4th, 2010 AT 9:15 AM
Tiny
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We've done that check also. Have fire to the distributor cap, but still no fire to the plugs once the cap is reinstalled.
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Sunday, July 4th, 2010 AT 9:18 AM
Tiny
JIM SHIRRON
  • MECHANIC
  • 77 POSTS
You lost plug fire when you changed cap & rotor, go back over that, re-install your old parts, they worked. Pay close attention to coil terminals in cap, they're easy to miss
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Sunday, July 4th, 2010 AT 9:44 AM
Tiny
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Sunday, July 4th, 2010 AT 9:54 AM
Tiny
JIM SHIRRON
  • MECHANIC
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Have you checked the button underneath the coil really close?
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Sunday, July 4th, 2010 AT 10:07 AM
Tiny
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Yes, I learned the hard way on that, I ended up buying a second coil because I didn't install the first correctly
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Sunday, July 4th, 2010 AT 10:25 AM
Tiny
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Correction, I had to purchase another cap not another coil
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Sunday, July 4th, 2010 AT 10:26 AM
Tiny
JIM SHIRRON
  • MECHANIC
  • 77 POSTS
Check your coil w/an ohmmeter, be sure its not open. You may have to pull the dist. Out, use jumpers for power & ground, and play w/it til it works.
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Sunday, July 4th, 2010 AT 10:52 AM
Tiny
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Getting off work, I'll check your reply later this evening, when I get to my home. Everything you've asked previously, has already been tried.
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Sunday, July 4th, 2010 AT 11:25 AM
Tiny
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I'M STARTING FROM SCRATCH AGAIN, I'M TAKING EVERYTHING APART TO MAKE SURE EVERYTHING IS INSTALLED CORRECTLY.
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Monday, July 5th, 2010 AT 3:18 PM
Tiny
JIM SHIRRON
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I'm at a loss, unless you have a module problem. Keep me posted on what you find out, I want to know.
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Monday, July 5th, 2010 AT 6:39 PM
Tiny
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The solution to my problem was resolved by disconnecting the four prong plug from the ecm module, which had evidently shorted out, causing no fire to be transferred to the spark plugs and installing a distributor without this connector. We used a another distributor ranging in years fron 1978 to the 80's. It beat having to buy an ECM module which was more han I was willing to pay. So far, so good, running like a champ.
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Friday, July 9th, 2010 AT 8:07 PM
Tiny
KHLOW2008
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Has the problem been resolved?
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Tuesday, July 20th, 2010 AT 7:32 AM

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