Engines missing when started - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Curly86 · 06-21-2008, 08:55 PM

I have an 86 Silverado with a 400 sb and a q-jet with a manuel chock. When I don't start it for 3 or 4 days it misses when I first start it for about a minute or two then it smoothes out. I just had the q-jet rebuilt thinking it was the problem but it still doing it.Any ideas what else it could be? Tks

James McClure · 06-22-2008, 07:14 AM

Hay Curly. You have answered your own question. You need 3 things for an engine to run right. A sound mechanical assembly, good fuel mixture and good ignition. You have the first 2, so whats left? Ignition. From what you describe, sitting for a few days, I would check over the cap, rotor and wires. With engine idleing, use a spray bottle with water in it and spray them down. Check the bottom of the rotor visually if you have an HEI distributor, you may find a clean spot near the center hub on the bottom of the rotor where it blew through. jim

Curly86 · 06-22-2008, 01:37 PM

Ok tks it has HEI on it I will check it out next weekend

06-21-2008, 08:55 PM	#1
Curly86 You want it there when??? Join Date: Oct 2006 Location: Lewisburg Ky Posts: 393	Engines missing when started I have an 86 Silverado with a 400 sb and a q-jet with a manuel chock. When I don't start it for 3 or 4 days it misses when I first start it for about a minute or two then it smoothes out. I just had the q-jet rebuilt thinking it was the problem but it still doing it.Any ideas what else it could be? Tks __________________ 1986 Silverado Flatbed 400 SB with 350 turbo 1997 Ford Explorer with 302 mydrive to work ride 1978 Gmc Midas RV 21ft with 46,000 actual miles 2003 Chevy Avalanche 5.3 327 and Tweety Bird Yellow Big Sandy Survivor 09 Trucks in the Blue Grass Survivor 09 TNCTC Streetcruzin

06-22-2008, 07:14 AM	#2
James McClure One shot, one kill. Join Date: Dec 2007 Location: Saratoga Springs NY Posts: 859	Re: Engines missing when started Hay Curly. You have answered your own question. You need 3 things for an engine to run right. A sound mechanical assembly, good fuel mixture and good ignition. You have the first 2, so whats left? Ignition. From what you describe, sitting for a few days, I would check over the cap, rotor and wires. With engine idleing, use a spray bottle with water in it and spray them down. Check the bottom of the rotor visually if you have an HEI distributor, you may find a clean spot near the center hub on the bottom of the rotor where it blew through. jim __________________ 1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shotJim or Paladin whichever you choose.

06-22-2008, 01:37 PM	#3
Curly86 You want it there when??? Join Date: Oct 2006 Location: Lewisburg Ky Posts: 393	Re: Engines missing when started Ok tks it has HEI on it I will check it out next weekend __________________ 1986 Silverado Flatbed 400 SB with 350 turbo 1997 Ford Explorer with 302 mydrive to work ride 1978 Gmc Midas RV 21ft with 46,000 actual miles 2003 Chevy Avalanche 5.3 327 and Tweety Bird Yellow Big Sandy Survivor 09 Trucks in the Blue Grass Survivor 09 TNCTC Streetcruzin



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