Some hesitation issues... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rod_Lei · 06-04-2011, 10:57 PM

Howdy guys!
I've got a 1988 C2500 with the 5.7 350 workhorse, it's starting to develop a weird hesitation problem. When I stop at a light, it idles rough. When I try to take off, it feels like it's choking, I mean rough. Then it will all be ok. If I'm cruising, it runs smooth, rough, smooth again, rough, and keeps doing that. I really don't know what to do. I sprayed throttle body cleaner in the TBI to no avail, I'm gonna put a fuel filter on it tomorrow to see how that goes.

Does anybody have any idea as to what could cause this?

Thanks for reading!
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scotts62 · 06-07-2011, 09:52 PM

Was it carb cleaner to check for vacuum leaks?

speedygonzales · 06-08-2011, 06:42 AM

Egr

Rod_Lei · 06-08-2011, 08:23 AM

Got it! Ha ha one of my spark plug wires melted to the exhaust manifold....
Then it would arc to the wire next to it and to the manifold, depending on which it wanted to shock:P
New wires and plugs and it's running like a champ, thanks guys!
Posted via Mobile Device

06-04-2011, 10:57 PM	#1
Rod_Lei Registered User Join Date: Jul 2010 Location: Waco, Texas Posts: 161	Some hesitation issues... Howdy guys! I've got a 1988 C2500 with the 5.7 350 workhorse, it's starting to develop a weird hesitation problem. When I stop at a light, it idles rough. When I try to take off, it feels like it's choking, I mean rough. Then it will all be ok. If I'm cruising, it runs smooth, rough, smooth again, rough, and keeps doing that. I really don't know what to do. I sprayed throttle body cleaner in the TBI to no avail, I'm gonna put a fuel filter on it tomorrow to see how that goes. Does anybody have any idea as to what could cause this? Thanks for reading! Posted via Mobile Device

06-07-2011, 09:52 PM	#2
scotts62 One day... Join Date: Apr 2008 Location: Tuttle, Ok Posts: 9,243	Re: Some hesitation issues... Was it carb cleaner to check for vacuum leaks? __________________ Scott 93 crew cab build Project 62

06-08-2011, 06:42 AM	#3
speedygonzales Registered User Join Date: Jan 2006 Location: Smithfield, VA Posts: 1,501	Re: Some hesitation issues... Egr __________________ 99 Z71 (98 body style) Pride and joy Last edited by speedygonzales; 06-08-2011 at 06:43 AM.

06-08-2011, 08:23 AM	#4
Rod_Lei Registered User Join Date: Jul 2010 Location: Waco, Texas Posts: 161	Re: Some hesitation issues... Got it! Ha ha one of my spark plug wires melted to the exhaust manifold.... Then it would arc to the wire next to it and to the manifold, depending on which it wanted to shock:P New wires and plugs and it's running like a champ, thanks guys! Posted via Mobile Device



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