Quote:
Originally Posted by itsaBRZ
Just wanted to give an update to anyone who is having the same issues as I was. After the install, I was getting check engine codes of P0171, P1170 and P117B. (Bank 1 system lean, port injection failed and direct injection failed)
I replaced the bypass actuator valve and this helped with the hesitation but I was still getting these same codes. I have since smoke tested for vacuum leaks and found none. I smoke tested for exhaust leaks and found a few so I replaced the necessary gaskets and no more leaks thereafter but still no fix.
After reading several threads, some suggested I replace the battery as that could be a cause for both P1170 and P117B but a new battery did not help. I was honestly getting desperate this point and decided to try and replace my front O2 sensor (it surprisingly fixed the codes of P1170 and P117B) and I'm not sure why as the O2 sensors were working fine pre-install.
However, I am now getting a new code of P050A (Idle air control system circuit low) and only during cold starts, also still getting P0171.
I searched this thread and entire forum for a solution but no one has found any for this code. Any help would be appreciated as I've been having problems with this kit for almost 2 months, thanks.
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How many miles since replacing the front o2 sensor? Did you check header for exhaust leak? The codes may come back after 20 or so miles. If you pressure/smoke tested and found absolutely no leaks, it could be in the tune.