1992 Cadillac DeVille Q&A
1992 Cadillac DeVille Question: rough idle
no codes idles rough for 10 min. then clears up - Visitor
no codes available for this in OBD1. from your description, it sounds like clogged injectors. Roy - mastertech6371
I agree it does sound like you may have clogged injector(s) try using a fuel system cleaner & some good octane gas and see how it acts. - sts_rider
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.
rough idle at start up. runs okay on road
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.