O2 reads .00v WOT

[85HOT-T]

Under WOT I am reading .00v and the car misses like crazy. Can high fuel pressure do this? I just put a wells coil on and heard that can be the problem too. Car runs fine unless under boost. Any insight would be nice. Thanks yall

 

[2QUIK6]

Seems like the O2 will drop to near 0 once its gets so far on the lean side.
May try adding a ton of fuel to see if you can get them back up.
A bad coil or ignition module may cause this too because the exhaust gases will be real cold if the spark is being blown out...and a cool exhaust temp will cause the O2 to not function properly.
Also, is the O2 healthy, Cross-counts cycling from 0-255 in less than 90 seconds at closed loop idle? If not, you need a new O2.

 

[BEATAV8]

sounds to me like it's going way lean for real....

check to see if the injector duty cycle is "up there" at WOT. If you have stock injectors your duty cycle should be better than 90% at WOT. If not, there's a short laundry list of stuff to check to find out why it's not commanding fuel.

check fuel pressure at WOT. you should have 40-45 PSI + boost pressure.

 

[85HOT-T]

It is wierd. Now it almost seems like it could be too much fuel. I have over 45 psi FP at idle. New o2 sensor, just put that wells coil on and am thinking it may be the problem. By the way the car has 009's with a bigger turbo and cam. like I said before runs good until boost.

 

[Lee Thompson]

ground

I would suspect a bad 02 ground wire.