Just developed this issue today and being that this is my first turbocharged car I would like to ask for some help diagnosing possibilities.
- When I cold start the car, everything is fine at idle.
- When I start to drive the car at normal throttle, the AFR tends get pegged at 10 after a minute.
- Come to a stop and now my idle is 10 for AFR.
- Now low throttle and normal throttle driving has awful response and is still at 10.
- Every now and then the AFR gets back to normal or almost normal for ~30 seconds, and then it will go back to 10 AFR.
After some research I've found a broad list of issues it might be:
- Air filter (new one shipped tomorrow)
- MAF dirty (about to go buy cleaner and spray it)
- Boost leak (after MAF?)
- Fuel pump (I already have a 485LPH brand new sitting at home)
- Spark plugs (20,000 miles on the same plugs, never replaced since turbo setup)
- Injectors
I was hoping I could get it narrowed down a bit more before I start throwing money at it.