3.5 Running Lean With CRABS And GT-R - Pontiac G6 Forum
 
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post #1 of 5 (permalink) Old 09-16-2011, 07:55 PM Thread Starter
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3.5 Running Lean With CRABS And GT-R

I have a 07 GT vert and have had full CRABS since January and the GTR since about March. On my way to DC this past week, I had my check engine light come on. The guy at Sears said the code was for the engine running to lean. He said it could be a vacuum hose leak. I called my local mechanic and he said it was more than likely a result of the intake and exhaust moving more air and the fuel ratio staying the same. He recommended getting a tune (WAMS). Has anyone else had this problem and has the WAMS fixed it?
Thanks

2007 GT Convertible: Black Eagle Eye's with 6K HID; Tinted Tails; Tinted windows; 18" ENKEI EKM3 Gunmetal Rims; LED Bulbs All Around; MPD Ram Air Hood; CRAB Option 3 & 4; GT-R Exhaust System
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post #2 of 5 (permalink) Old 09-16-2011, 10:03 PM
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A tune should fix it, however first try a computer reset.
Disconnect your battery for 25-30 minutes and see if that fixes it.

06 GT - black on black
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post #3 of 5 (permalink) Old 09-18-2011, 07:23 PM
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before you do anything else, check your intake, if there is a vaccum leak after the MAF sensor the car will run lean

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post #4 of 5 (permalink) Old 09-18-2011, 10:16 PM Thread Starter
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Is there an easy way to check the vacuum lines or is that something that a shop would have to do?

2007 GT Convertible: Black Eagle Eye's with 6K HID; Tinted Tails; Tinted windows; 18" ENKEI EKM3 Gunmetal Rims; LED Bulbs All Around; MPD Ram Air Hood; CRAB Option 3 & 4; GT-R Exhaust System
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post #5 of 5 (permalink) Old 09-18-2011, 10:59 PM
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Quote:
Originally Posted by coastiejoe View Post
Is there an easy way to check the vacuum lines or is that something that a shop would have to do?
It also sounds like unmetered incoming air to me. The fuel trim system can compensate for any amount of incoming air but only if it's all metered.

A smoke machine test is the safe & easy way to find intake leaks but only shops have them. It's not very expensive to have done.

Of course, there's always the DIY propane method.




Last edited by greenman; 09-18-2011 at 11:12 PM.
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