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Jasper911 · 12-21-2008, 10:18 AM

Yuck, feel the pain.

I'm glad I'm not the only one dumping tons of money into an old truck. Mines doing similar stuff. Replaced the 305 with a 355 roller with Comp cams computer cam/flat tops/roller rockers etc. The 305 seemed worn out and ran rich, but still having same problems with new engine.

Might want to check the vehicle speed sensor. Mine was pretty jacked up looking and surely no good, but still not my problem.

Interested to see if there's any closure on this one.

I wouldn't go looking for a new engine just yet.

12-21-2008, 10:18 AM	#130
Jasper911 Registered User Join Date: Dec 2008 Location: KY Age: 38 Posts: 13	Re: 1991 chevy 1500 5.7 tbi erratic idle Yuck, feel the pain. I'm glad I'm not the only one dumping tons of money into an old truck. Mines doing similar stuff. Replaced the 305 with a 355 roller with Comp cams computer cam/flat tops/roller rockers etc. The 305 seemed worn out and ran rich, but still having same problems with new engine. Might want to check the vehicle speed sensor. Mine was pretty jacked up looking and surely no good, but still not my problem. Interested to see if there's any closure on this one. I wouldn't go looking for a new engine just yet.