My 2001 Boxster is making me nuts. Recent engine work:
- Replaced AOS
- Replaced MAF
- Replaced all four oxygen sensors
- Replaced coolant reservoir and all hoses
- Cleaned throttle body and intake plenum
Car is running rough at idle and showing CEL with DTC Codes P0300, P0305, P0306, P0304 (see attached image).
Any thoughts on what could be causing this?
Thank you!!!