Questions & Answers for: engine warm runs rough

engine is, the more fuel it needs to star/run until it warms up, and the O2 sensors tell the computer how to properly meter the fuel according to a 14.6:1 (air:fuel) ratio also, what rpms does it run

warm up My 1991 cadillac devile(4.9) runs great when cold,but after it warms up it starts to run rough. No engine lights come on dash indicating a problem. I have also changed the air and fuel filter.

...engine is warm for 10 minutes and encounters a stop sign or deceleration; the engine light comes on and it will continue to run rough until it cools down and is restarted. Most likely air flow metre. ...

...warm I have a 1998 Toyota xl, It runs rough until the engine warms up, then it runs like a champ. I had a code, it was the camshaft position sensor, this has been changed and I do not have a check ...

engine starts running rough after warming up. the egr valve should be opened when warm If not the engine will die out or run very rough

...up starts fine but runs rough for about two miles then runs fine. Does not help to let the engine warm up before driving, but driving does. could be your temperature sensor or a vacuum leak

...engine were turned off when warm and then restarted, it would then run rough as if not all plugs were firing and I could smell unspent fuel. Lately, it will eventually run rough when the engine warms ...

...04 Mercury Monterey Van runs rough and check engine light flashes when first runs in morning. Once it gets warmed up runs fine rest of day. Codes come up as runs to lean. p0171 and p1074. O2 ...

...runs great when cold. When the truck warms up it begins to run rough almost cuts off the engine when running down the road. Does it run rough at hot idle ? How many miles ? Any recent work done on ...

...engine runs rough after warm up. Replaced canister with valve & sensor. Still runs rough after warm up. Is running rough problem related to p0450 problem. Fuel tank pressure sensor may be a different ...