Q&A

1992 Cadillac DeVille

Question: rough idle

• Rough Idle Due to EGR Valve Sticking Open
  The EGR valve may stick open, causing a rough idle and/or the Check Engine Light to illuminate.

  Common Problems > Cadillac DeVille

• rough idle
  rough idle at start up. runs okay on road

  Q&A > Cadillac > 2003 Cadillac DeVille

• Engine runs rough when at idle otherwise okay.
  Dealer put computer on car and said that the error message indicated an the cause of the rough running engine at idle was due to the air conditioning. Something about carbon getting to a valve or t...

  Q&A > Cadillac > 2002 Cadillac DeVille

• I replaced my isc motor but my car still idles rough in drive at stop
  Why does my 91 deville with a 4.9 liter idle ruff feels like it is going to die I replaced isc motor and measured where the screw sits on the throttle arm. But it still doesnt idle smooth. Is this ...

  Q&A > Cadillac > 1991 Cadillac DeVille

• how to replace EGR Valve
  When putting auto in Reverse and idling out of the garage, it "jerks" and does not run smooth. Also, going up hills from 50-60 mph, it has a really rough (rpm shift--not shift in gears). At stop ...

  Q&A > Cadillac > 1998 Cadillac DeVille