: 1981 Fleetwood Brougham Rough Idle

05-20-10, 04:18 PM
1981 Fletwood Brougham with the 4-6-8 engine runs good. There is an intermittant rough idle tough. When starting cold, the idle is rough for a few seconds but smooths out. Most of the time when the engine is warn the idle is very smooth. There is somtimes, though when stopped at a light the idle will start to become rough. You can drive for a while and the car will idle smooth at several more lights and then begin to idle rough again. Not too rough, but enough to feel it in the seat and be annoying. Any advice? Thanks

05-20-10, 04:22 PM
First thing I would check is vacuum lines. Look for any cracks. Replace any that look questionable.