4XForOffroad
Well-known member
Cleaning out the idle air control valve can sometimes fix stalling at idle, plus it’s free!
1997 Ford Ranger 4.0l CE LIGHT
- Thread starter BFAB
- Start date
84projectFORD
Well-known member
- Joined
- Apr 1, 2022
- Messages
- 371
Its time to watch scan data…
What is the maf saying at idle? Lbs/hr should roughly match the engine size. Also need to see if its lazy or dropping out when driving. Dont put anything but a motorcraft/denso/hitachi/delphi in if you are gunna chuck parts at it.
Next I’d monitor the o2’s. You need to see if the upstream is switching correctly once they warm up and run closed loop. Bosch o2’s are fucking junk. NTK or Denso or Motorcraft only.
My money is on one of those two causing the lean codes.
What is the maf saying at idle? Lbs/hr should roughly match the engine size. Also need to see if its lazy or dropping out when driving. Dont put anything but a motorcraft/denso/hitachi/delphi in if you are gunna chuck parts at it.
Next I’d monitor the o2’s. You need to see if the upstream is switching correctly once they warm up and run closed loop. Bosch o2’s are fucking junk. NTK or Denso or Motorcraft only.
My money is on one of those two causing the lean codes.
