CEL blinking under boost?

[ihiryu]

Hey guys I've got my 2jz-get w/ 7m electronics. I was having a few issues with random codes and knock sensors. I've taken care of all that stuff finally and rewired my knock sensors good to go now!

I took the car out on a test run, and if I go WOT, it'll sputter around 4500 to 5500; jerking real bad, and the CEL light comes on. I let off the throttle or I shift, then the CEL will go away.

Currently I'm thinking that is the way it measures knock and retards timing; but I'm not sure, I was hoping someone could chime in

 

[YotaRob]

What code does it spit out? if you dont shut down the engine it should't erase any codes.

 

[ihiryu]

That's the thing, the code doesn't stay! The CEL comes on as I near the 4500 range at WOT, stays for a split second, then shuts off. During this time the car buckles, shakes and stutters.

If I ease her up there with partial throttle she's good to go, the moment I go to WOT she'll spit and sputter and the mysterious CEL will come on, then I'll let off, then the CEL goes away

 

[YotaRob]

sounds like fuel cut, or lack there of. That psi boost are you running when this happens and if you have a wide band is it leaning out? Back when I had the 7m, overboost and lean would do this but could never get the code it kept throwing.

 

[ihiryu]

Double post

 

[ihiryu]

what's fuel cut set at? 8.5 psi? I'm not really sure cause my boost gauge isn't working right now. I'm waiting for my STRI one to come in...

 

[Poodles]

Sounds exactly like fuel cut...

 

[lagged]

...or detonation.

 

[ihiryu]

dang man, I don't know how I'm getting fuel cut, because dok33 and I are pretty much running the same setup! He's running eleven psi without FC, well I don't know how much boost I'm running either but then again I don't have a gauge.

It doesn't feel like 11 psi to me though...

 

[Poodles]

Fuel cut is based on the amount of air over the AFM, not PSI. Don't go by the butt dyno and get a gauge...

You'd probably be better to post this in the 7MGTE sectionas the electronics are 7M...

 

[ihiryu]

Yeah I'm just anxious, yeah I guess it'd be better to go over to the 7m section.