Rough Idle
Thread Starter
Intermediate
Joined: Jan 2006
Posts: 36
Likes: 0
From: Wauconda Illinois
Rough Idle
HI,
I'm a newbie 99 coupe owner with Corsa pipes, X-over, and black wing. Not sure if a rough idle is normal? Car runs great, no pops or anything just a little rough at idle.
Extended warranty expires in 2 months, anything else to check aside from the codes (no more codes after I put a new Optima battery in)!
Thanks,
Dan
I'm a newbie 99 coupe owner with Corsa pipes, X-over, and black wing. Not sure if a rough idle is normal? Car runs great, no pops or anything just a little rough at idle.
Extended warranty expires in 2 months, anything else to check aside from the codes (no more codes after I put a new Optima battery in)!
Thanks,
Dan
Burning Brakes
Joined: Nov 2004
Posts: 822
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From: Grafton Ohio
Originally Posted by cbx1047cc
Rough idle is not normal unless you have a big cam. The first thing I would check for is a vacuum leak, especially around the mass airflow sensor.
A dirty MAF will also cause poor and or rough idle.
Team Owner
Joined: Dec 1999
Posts: 174,312
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From: Here
Pilot of Beer Force 1
Tampa Regional Coordinator
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I believe in the Beer Fairy
yep...air leaks around the air bridge are common...unmetered air will cause a miss just like a bad wire or plug
Thread Starter
Intermediate
Joined: Jan 2006
Posts: 36
Likes: 0
From: Wauconda Illinois
rough idle
So aside from visual inspection how do I find air leaks?
Looks like electrical contact cleaner is reccomended as a cleaner with the MAF off the car.
Thanks for the help, the forum has taught me alot in the past month or so!
Dan
Looks like electrical contact cleaner is reccomended as a cleaner with the MAF off the car.
Thanks for the help, the forum has taught me alot in the past month or so!
Dan
Team Owner
Joined: Mar 1999
Posts: 28,753
Likes: 9
From: San Jose/Bear Valley CA
CA Events Coordinator
I would try switching out the black wing with a stock air box... as we have found in the past some C5's dont run well with that installed. (Its been well documented on this forum) 
VR
VR
Pro
Joined: Dec 2004
Posts: 503
Likes: 1
From: Belchertown Massachusetts
When I bought my '99 a few months ago I noticed a rough idle. Drove it for about a week. Read the forum suggestions. I ended up putting in a fresh load of fuel along with a bottle of STP injector cleaner. The idle problem was gone in less than 100 miles. Cost.....$2.50
