1991 Cadillac DeVille "rough idle stops" Questions

at stop lights or stopped traffic/ rough idle, pulling or surges when driving and at stopped lights and stopped traffic-why? Try filling it with a top grade premium gas. Replace the idle control motor

...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 ...

...rough idle and it does not do it everytime. Here are the most common causes of surges, stalls at stops, low erratic idle speed, rough idle and engine hesitation (and other problems), it is in most ...

Idle control motor. Happened to me, they remove it, unless you want to pay $700 for the new one. However it idles really rough for awhile after startup now, but eventually smooths out. Can cause vapor

WHAT CAN YOU DO TO STOP ENGINE FROM ROUGH IDLING? Replace the idle control valve

...idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can ...

...rough idle. runs at high idle with map disconnected. i'm tried of replacing everything and no difference. is it the iac for other $263.00 with no guarantee of running right. I FIXED IT BY NUMBER 1 : ...

...stops usually at traffic light. no roughness prior. sounds like an IAC motor. that stands for idle air control motor. it adjusts throttle to keep at steady speed. could possibly be throttle ...

IDLE ENGINE COOLANT HOT and my coolant temp is at 240-260 F , I ADDED COOLANT TO THE RESEVIOR, ADDED OIL AND MY CAR WAS STILL READING THE SAME THING AND RUNNING ROUGH You have most likely blown a head

rough idle in start up minimal driving will stop smoke and rough idle i think you have a water leak maybe the head gasket is going bad any way gasoline produces water and is normal with cold