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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 ???)
What else can I help you with?
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
What are the effects of a bad fuel pressure regulator?
Really bad fuel economy, engine runs rough when warm (possibly won't start or hard to start when warm), possibly black smoke from the exhaust, unusual noises from the fuel pump, and general poor performance.
What causes a 8.3 L Cummins to starts hard run rough til warm will not start while warm?
A 8.3L Cummins engine that starts hard, runs rough until warm, and won't start when warm may be suffering from several issues. Potential causes include fuel system problems such as clogged filters, failing injectors, or a malfunctioning fuel pump, which can affect fuel delivery. Additionally, issues with the engine's heat management, such as a faulty thermostat or EGR system, can lead to rough running and hard starting. Lastly, electrical problems, such as weak batteries or poor connections, could also contribute to starting difficulties.
What would be wrong with a 1993 Chevy Corsica if it runs rough when its cold and runs better when its warm?
Likely needs a tune up. Replace all spark plugs, plug wires, distributor cap (if it has one) and air filter. If it still runs rough you will have to go to a mechanic.
1992 Saturn runs good when cold misses when warm?
This issue could be due to a faulty ignition coil, spark plugs, or fuel injectors. When the engine is warm, these components may struggle to function properly, causing the misfiring. Have a mechanic inspect and potentially replace these parts to resolve the issue.
Why does 1998 dodge 1500 ram run ok when cold but runs rough and stalls when warm?
temp senser or spark coil
1993 Ford Explorer during warm-up revs and runs fine after warm-up idles rough and shutts down?
Could be a plugged catalytic converter or bad coil. Both will act up when they get warm.
Why does a pickup truck stall when the engine is cold then runs smooth once the engine is warm?
If carb. perhaps choke is not working properly
What's going on Rough shifting - AC blows warm air temp - gauge between the thermometer icon and H?
Had the same problem with 2001 Explorer Sport 4.0 SOHC. Thermostat was the problem. Engine was overheateing causeing rough shifting and warm air out of AC. $15.00 Fix!!!
Why does your 1992 Saturn sl1start to run rough and backfire after engine is warm?
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?
Seeing as it is a diesel engine it has to warm up first in the colder weather. You say that you are starting the engine early in the morning? Well the black smoke may be caused by he motor being cold or simply by the fact that it is a big diesel engine. The rough ride you are referring to is caused by the motor being under-heated, and then as the engine heats up it smooths out.
