Fuel Trim Malfunction

[Red GST]

anybody know what the code fuel trim malfuntion bank 1 is caused by or what you have to do to fix it?

[Shane@DBPerformance]

Your running too rich or too lean at part throttle/idle.

[Red GST]

and a fix would be?

[Shane@DBPerformance]

Look at your short/long term fuel trims and see if your too lean or too rich and then correct the situation.

[Red GST]

ecoli thanks for helping man but there is nothing other then stock parts altering any fuel maps the only thing i could think of is that all emmissions are removed from the car and maybe i have an o2 going bad????

[Shane@DBPerformance]

Yes, it could be the O2 is going bad or your just overrunning the 2G FPR. Do you know your fuel trim #s? If you have changed anything recently, I would reset the ECU and see what the fuel trims do over the next few days. The 2G ECU gets mad and starts throwing fuel trim errors when your as little somthing like 12% out of trim, the 1G ECU doesn't give a shit.

[Red GST]

well i have reset the ecu numerous times the thing is that the car did this on the old motor and on my new motor

stock fuel pressure regulator - could need replaced
o2 sensor ( due to race gas ) - could need replaced

and the only other thing the car does that is out of wack is some times the throttle will move around at idle. like it will drop and raise it self in a range of about 400 rpm

and when the car is cold if you start to build boost where it would require more fuel it hits like a fuel cut for about 3 seconds then snaps right out of it

thanks for the help