Rough idle/hard start
#1
Rough idle/hard start
I’ve been plucking away at some work on my girlfriends car-1999 Chevy cavalier 2.2l. I’ve changed a fuel filter spark plugs/wires, and the coil packs. The plugs and coils made the car run a lot better all around but it still shakes quite a bit without a foot on the throttle, as well as won’t start unless you tap the gas. Was thinking of trying fuel pump next but didn’t make sense as the car runs great at all speeds. Any help is appreciated.
#3
If you have to tap the gas pedal it's running lean (getting too much air/not enough fuel) So:
IAC (Idle Air Control Valve) Clean/replace
Vacuum leak
Clean MAF (Mass Airflow Sensor) See YT for info
Check air cleaner
If none of that helps do a compression check.
IAC (Idle Air Control Valve) Clean/replace
Vacuum leak
Clean MAF (Mass Airflow Sensor) See YT for info
Check air cleaner
If none of that helps do a compression check.
Thread
Thread Starter
Forum
Replies
Last Post
conanthebarbarian
Silverado, Sierra & Fullsize Pick-ups
7
May 29th, 2012 10:06 AM
warrior_oh58d
General Tech
0
January 23rd, 2009 4:08 PM