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Old 07-27-2008, 01:38 AM   #1
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Default Pegged very Rich.. can't idle. Help?

Hi Folks,

All of a sudden my car goes full rich across the board... can't idle... WB02 showing 10:1 at idle and while driving, cruising and in boost.

What sensor could go wrong? NB02? vaccum leak? AFM?

My set up is on the signiture... Thanks for any respones or comments.

Regards,
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Old 07-27-2008, 08:15 AM   #2
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My walbro fuel pump is making alot of noise... I am guessing it could be my Vortech its shut close..
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Old 07-27-2008, 08:26 AM   #3
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Could be your O2 is disconnected or has crapped out.

With Autotune you will default to full rich under that circumstance. If the Autotune is not activated, your ECU will go into rich safe mode
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Old 07-27-2008, 08:50 AM   #4
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or the FMU coulda gotten stuck.
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Old 07-28-2008, 03:34 AM   #5
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No luck...

Removed FMU... idle crap
Replace OEM FPR... idle crap (Checked Fuel pressure = 45 psi)
Replace Walbro 190PH with OEM FP... idle crap

Funny thing was... when I unplug the YELLOW connector (prime mode) the car idle solid = 0 psi pressure in fuel rail.

Next... replace injectors...

Anything else?
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Old 07-28-2008, 06:07 AM   #6
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replace injectors.... same

replace AFM ...... BINGO!! the AFM flip was stuck wide open!
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Old 07-28-2008, 06:24 AM   #7
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Good to hear you fixed it.
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Old 07-28-2008, 06:25 AM   #8
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Quote:
Originally Posted by Mimime View Post
replace injectors.... same

replace AFM ...... BINGO!! the AFM flip was stuck wide open!
Doesn't needlessly replacing **** REALLY suck once you find out what the real culprit was?
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Old 07-28-2008, 10:09 AM   #9
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You ever notice it's always the last thing you check?
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Old 07-28-2008, 10:47 AM   #10
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Thanks everyone,

I had a great time practicing swapping parts out of the car..........................
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