2003 Cadillac DeVille Q&A
2003 Cadillac DeVille Question: rough idle
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The EGR valve may stick open, causing a rough idle and/or the Check Engine Light to illuminate.
and apply the brakes. I experience rough idle until i start driving again.
In addition when first started there is no power brake assist. I have to rev the engine to get the vacum to build. The engine seems to run fine above 1500 rpm and drives fine on the highway. Sugge...
Fuel injectors can short-circuit electrically causing a rougher than normal idle and reduced performance.
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...