I have an 07 GTI 6 speed. The idle is been hunting while idle. It goes from 1k and goes up slowly to 2k and drops back down to 1.
A check engine light came on and these are the codes:
P0507 - Idle air control system. RPM higher than expected
P0300- Random multiple misfire
P0301 - Cylinder 1 2 3 4 misfire
P0171- Bank 1 system too lean
This car is completely stock. What does this problem sound like?
Thank you in advance.