chiri
Member
- Joined
- Mar 5, 2019
- Messages
- 14
- Reaction score
- 1
- Location
- chile
- Vehicle Year
- 1996
- Make / Model
- ford ranger
- Transmission
- Manual
Hi, Looking from some input from the experts.
Have a 97 ranger 2wd with a recently swapped Explorer 4.0, complete engine and wiring. Only pending issue is I am running a MT with a AT computer.
Its running quite well but at wot and around 3.000rpm, it starts missing on some cylinders. If I return to Idle it runs ok and can accelerate VERY careful but any more than feathering the throttle, return the missfire at all rpms.
This stays as permanent until I cut the engine and start it again and everything is normal until it comes again. Can drive all day if I am careful, this happens always when near WOT and always over 2.000rpm.
Changed the ignition coil but no change.
Tach keeps working during the missfire so this discard CKP failure(?)
Fuel pressure a little lower than specs but ok, no change during the missfire.
Any idea what to look for?
Have a 97 ranger 2wd with a recently swapped Explorer 4.0, complete engine and wiring. Only pending issue is I am running a MT with a AT computer.
Its running quite well but at wot and around 3.000rpm, it starts missing on some cylinders. If I return to Idle it runs ok and can accelerate VERY careful but any more than feathering the throttle, return the missfire at all rpms.
This stays as permanent until I cut the engine and start it again and everything is normal until it comes again. Can drive all day if I am careful, this happens always when near WOT and always over 2.000rpm.
Changed the ignition coil but no change.
Tach keeps working during the missfire so this discard CKP failure(?)
Fuel pressure a little lower than specs but ok, no change during the missfire.
Any idea what to look for?