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,

My walbro fuel pump is making alot of noise... I am guessing it could be my Vortech its shut close..

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

or the FMU coulda gotten stuck.

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?

replace injectors.... same

replace AFM ...... BINGO!! the AFM flip was stuck wide open!

Good to hear you fixed it.

Doesn't needlessly replacing shit REALLY suck once you find out what the real culprit was?

You ever notice it's always the last thing you check?

Thanks everyone,

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