1992 Cadillac DeVille "runs rough" Questions

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Question about Cadillac DeVille

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...runs rough especially on idle bad fuel milage--computer said replace egr and right oxygen censor-(replaced parts)-cleared computer and it stays clear but engine after running a few minutes runs rough ...

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i got an diagnostic and it said the idle air valve is bad.i got it changed but its still runnin rough A idle speed motor will not cause your engine to run rough.It might idle high or stall. If your ...

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Runs rough? I have a 1994 Deville Concourse. It runs rough. Cadillac Converter has been hallowed by previouse owner. Map sensor has been replaced. No codes present and only Supension codes in History.

Question about Cadillac DeVille

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rough idle after 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

Question about Cadillac DeVille

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runs rough 1998 DeVille Hard to cold start,runs rough cold,been in for service,they say all sensors are good.Fuel pump O.K.They can not fix Had another mechanic look at it ,As of now we are told there

Question about Cadillac DeVille

2 Answers

...rough idle with the inspection of the cap and rotor cap and rotor do have a tendancy to arc internally and create misfire so does sparkplug wire that can leak spark voltage to ground and create ...

Question about Cadillac DeVille

1 Answer

...rough Starts and runs fine as long as you don't stop. Once you stop and let idle for a couple of minutes the engine light comes on and the engine begins to run very rough. Will run great with ...

Where do I find the knock sensor on a 1994 cadillac deville 4.9 engine? The car is running rough Knock sensor is on the right (passenger) end of the engine, and will activate if at least one of the ...

runs rough. after short time it At startup, car runs rough. After short time it clears up and runs ok. I put in Seafoam to remove possible moisture in gas. Have someone start it for you in the morning

Question about Cadillac DeVille

3 Answers

...runs rough just on idle replaced plugs-wires-cap-all motor mts-cleaned injectors.runs and drives perfect but at idle in gear it is rough.can you help me?4.9 eng If by rough you mean it sputters like ...

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