Idling Problem
Thread Starter
Burning Brakes
Joined: Dec 2000
Posts: 1,161
Likes: 0
From: Orangeburg, NY
Idling Problem
89 Coupe automatic.
The car was running great. At a 1/4 tank, filled it up with premium (as usual) and took it home. The next day an idling problem started. It starts out ok (700 RPM), then after a minute or two it fluxuates from anywhere from 500-900 RPM. Checked some vacuum lines and they seemed ok. Any suggestions? A vacuum leak somewhere? Bad gas? The fuel pump seems ok and the tank is pressurized? I am puzzled.
The car was running great. At a 1/4 tank, filled it up with premium (as usual) and took it home. The next day an idling problem started. It starts out ok (700 RPM), then after a minute or two it fluxuates from anywhere from 500-900 RPM. Checked some vacuum lines and they seemed ok. Any suggestions? A vacuum leak somewhere? Bad gas? The fuel pump seems ok and the tank is pressurized? I am puzzled.
Safety Car
Joined: Jul 2004
Posts: 3,835
Likes: 30
Instructor
Joined: Jul 2007
Posts: 174
Likes: 0
From: Toronto Ontario
Spray throttle body with carb cleaner inside and out. There should be a hole beside throttle plate ( this is the IAC passage ) and should be sprayed thoroughly to free up passage. Should idle fine after that.
Safety Car
Joined: Jul 2004
Posts: 3,835
Likes: 30
NO......if you are going to spray anything, use THROTTLE BODY CLEANER, not carb cleaner..
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Le Mans Master
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Check your IAC. It will not throw codes, but will just die, aor run bad as many have found. Scanning only whos what the ecm is telling it to do.
http://shbox.com/1/iac2.jpg
http://shbox.com/1/iac2.jpg
Instructor
Joined: Jul 2007
Posts: 174
Likes: 0
From: Toronto Ontario
