Rev problem

[kersh97gst]

Hey guys I'm having problems with 97 GST. I am currently using ECU Plus, and a few weeks ago it shot out some trouble codes. One said my Mass air flow circuit was out, the other said bank two O2 sensor heater was out. I just replaced both today and restarted the ECU. Problem is the same trouble codes are coming back up once again. My car will idel fine, but when i try to rev it only shoots to 2500 RPM then just sputters. The rev limiter is at 4000 rpm. Any advice?

 

[slickers111]

Try cancelling the 2 step. See if that helps.
Otherwise, search threads. there are alot with the REV issue you explained.

 

[euphoria]

Boost leak test, then tell us if it's still doing it.

 

[kersh97gst]

I'm kinda new to this aftermarket ECU thing. What do you mean by 2 step process.

 

[diamond-star]

I'm kinda new to this aftermarket ECU thing. What do you mean by 2 step process.

launch conrtrol..turn it off. and do a boost-leak test