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In 1980 I overhalled my Chevy V-8 engine ran great when cold and hot . After, approx. 30 min started to run rough than quit. No fun when the engine is operating a boat. No way could you start the engine. Next 5 days starts and ran fine until approx 30 min. then the same old thing. I checked fuel system, condenser, timing, distributer, spark plugs gap, all OK. Removed each plug wire when running, spark OK. After about a week I'm about to go nuts. One day with the engine hot and killed, I removed each plug one at a time and rotated the engine for each with the starter ( Of course I'm at the dock ) Found no spark at the gap on three plugs. Spark was shorting to ground inside the plug cermatic housing . I had tested the plugs at the local service station prior to final assembly of the engine, of course the plugs were cold and tested OK. I replaced the plugs with new and that solved the problem ( Moral to the story. I should have inatalled new plugs in the first place . How would I know when they tested OK when cold. Maybe trying to save a buck ???)
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∙ 12y ago
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Truck runs rough when warm if you accelerate slow it runs fine but if you step on it bangs hard and misses but it does not do it all the time changed the fuel filter and it drove fine for about a week?
try your idle control valve also your fuel pump i had a problem similar to yours and it was the fuel pump
Why would a 96 gmc sierra stall and run rough until the engine is warm?
It stalls even when warm
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Does it miss on acceleration or at idle? If on accel I would be looking at the plugs and wires
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What would be wrong with a 1993 Chevy Corsica if it runs rough when its cold and runs better when its warm?
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check your coolant temp sensor also is the ses light on,posible egr fault
On a 2004 F-250 Power Stroke 6.0 diesel why does is shoot out black smoke first thing in the A.M. from the exhaust pipe and runs rough and smooths out about half hour after running engin?
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1992 Corvette w 5.7 LT1 engine Cold startup want to die until you keep foot on it till its warm Also idles rough but open road runs great.can someone help?
check coolant temp sensor, the computer is still running on open loop, doesnt know engine is cold, unplug sensor, it should run the same, do you have check engine light on ??
