HELP! P1128, P0171 Code...New Lean Code Thread***UPDATED

[ballistik8]

As some of ya'll have seen, I have posted up with P1128 code...

The car was in the shop awhile ago, and was given a 1+apr tune and injectors.

After 50 miles of driving, the car threw a P1128 Code. We boost/vac tested, replaced maf, replaced air filter.

The car continued to have problems, and we suspected o2 sensors. The car threw a Lambda Oxygen code, and started running like a pig. The o2's were shot, no question.

So I took the car in, got the 2+testpipe file, 2.5" downpipe, and 3" testpipe. replaced both o2 sensors, and changed the plugs to ngkbkr7e-ix iridium. The car runs amazing now, but it threw a code AGAIN after 50 miles.

This time, the code P0171; system too lean showed up.


The injectors were bought used, and that brings up a question, but I don't want to go buy new ones unless it is undoubtedly the cause of the CEL. One supporting fact for possible injector issues is that this code NEVER showed on my car for 100k miles w/ a APR stg 1 tune. It has only come on since the injectors and 1+ tune.

Also, I noticed a very very small leak on the exhaust after the twin resonators and before the mufflers (if that would matter).

WTF DO I DO??? PLEASE HELP.

[ballistik8]

anyone?

[[email protected]]

I thought this was a common problem with the APR tune that was never settled.

EDIT: Yep, here you go: Click Click