Questions & Answers for: Cadillac runs rough

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.

97 catara running rough at idle car run at to low a rpm and sounds rough when it idles service engine First check 4 the engine ligth if it's on if it is get the codes

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

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

engine runs rough it take two attemps to start, when started it runs rough, when accelerated it hesitates and stalls check the fuel filter,and the fuel pump pressure,it sounds like fuel pump.

...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 ...

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 ...

...runs rough at start up then get better but still rough. Anytime I see P0171 and P0174 together the first thing I look for is vacuum leaks. Specifically the upper intake plenum gaskets. The codes ...

...RUNS ROUGH WHEN RAINING SOLD A 2005 CTS V-6, CUSTOMER COMPLAINS CAR RUNS ROUGH WHEN RAINING OUTSIDE Sounds like a secondary ignition problem to me.  See if you can duplicate the symptom by using ...

...with engine warning light flashing the engine warning light came on and the engine started vibrating (running rough). the engine even vibrates (runs rough) when the car is at idle. what are the ...