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Thread: Hight idle, code 507. 97 Burb
03-12-2007, 05:28 PM #1
Hight idle, code 507. 97 Burb
I have a high idle, just over 1K RPM. I get a check engine light and code 507. Iac idle higher then expected.
So is there a way to test the iac valve beffore I sped $100 for a new one? Could there be something else that may set off this code? Any vacuum lines that are prone to break? I heard something about the throttle body gaskets being prone to leaking?
With the cost of gas, I'd really like to have her running as best as possible.
PS: 5.7L Vortec 97 Suburban.
03-12-2007, 06:55 PM #2
Hi Eric I hope this helps...
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are):
Idle air control motor failed.
Open or shorted idle air control motor circuit, or loose connector.
There is a troubleshooting procedure for checking the circuit and pinpointing the problem, but before doing that I would recommend cleaning the throttle body first. Many times a simple cleaning will eliminate this code.
2007 Ford E250(Work van) (Ya, Ya, shut up!)
1996 GMC Sierra SLE 1500 5.7L/4L60E
03-12-2007, 07:15 PM #3
thanks for the reply.
Cleaned out the TB with cleaner and a toothbrush. It's spotless. I think I need to bite the bullet and buy an IAC.. *sigh*
what should the idle be at on a 5.7 Vortec? I got the truck with this prob..
03-12-2007, 07:24 PM #4
I think idle speed is 600 hot and 800/900 cold...
03-12-2007, 10:29 PM #5
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