For sometime now I have been repeatedly getting a P0171 and P0174 codes running lean conditions there is no leaks that I have been able to trace down then I started getting a cylinder eight misfire replaced all the plugs and cylinder eight ignition coil. Cleaned the MAF bought two new oxygen...
I have been receiving the above mentioned codes randomly for the past few months although they seem to be getting a little more common place.
The codes are either together or is only the P0171 Code
They only appear at start up or when idling
Here are my engine mods:
I've had rotofab, ARH headers, and custom VMS tune for 6months+ and no issues - now I get the following all of a sudden:
P0131 - 02 Sensor circuit low voltage
P0171 - system too lean (bank1)
P1133 - HO2S Insufficient switching
Checked rotofab closely for cracks or loose connections and...