Precious88xj
NAXJA Forum User
- Location
- Los angeles
Working with 1988 jeep cherokee 4.0 auto trans 4x4 with a 96 jeep cherokee engine
Background that led me to current situation:
My original engine gave out I had about 70 psi of compression couldnt really drive i decided to swap in the a engine from a 96 cherokee which was in a wreck but had apparently been rebuilt. I did the swap and when I attempted to turn on the vehile it didnt run correctly. It stumbles and idles poorly. At about 2000 rpm it will backfire i saw fire out of the exhaust. Have not been able to actually drive it .
Diagnoses I have done
Fuel pressure 31 vacuum connected/39 disconnected
fuel pressure regulator not leaking
the fuel pressure holds after i turn off the jeep no leaks
compression test dry 1-159,2-159,3-170,4-163,5-163,6-170
multimeter tests map sensor,coolant temp sensor, tps(adjusted),intake manifold sensor they all tested to spec
spark on every cable
cleaned up the grounding connection
i also have nickintimes computer reader the codes that did show was loop fault rich and loop fault lean
New Parts:
Fuel Injectors,fuel pump,regulator,filter
coil,distributor,ditributor cap,plugs,cables, rotor
TPS,CPS,O2 sensor,IAC,
Im at a loss I applied all applicable tips by cruiser and I dont know what to do.
If necessary I would be willing to record all test procedures to make sure I havent been doing something incorrect.
Background that led me to current situation:
My original engine gave out I had about 70 psi of compression couldnt really drive i decided to swap in the a engine from a 96 cherokee which was in a wreck but had apparently been rebuilt. I did the swap and when I attempted to turn on the vehile it didnt run correctly. It stumbles and idles poorly. At about 2000 rpm it will backfire i saw fire out of the exhaust. Have not been able to actually drive it .
Diagnoses I have done
Fuel pressure 31 vacuum connected/39 disconnected
fuel pressure regulator not leaking
the fuel pressure holds after i turn off the jeep no leaks
compression test dry 1-159,2-159,3-170,4-163,5-163,6-170
multimeter tests map sensor,coolant temp sensor, tps(adjusted),intake manifold sensor they all tested to spec
spark on every cable
cleaned up the grounding connection
i also have nickintimes computer reader the codes that did show was loop fault rich and loop fault lean
New Parts:
Fuel Injectors,fuel pump,regulator,filter
coil,distributor,ditributor cap,plugs,cables, rotor
TPS,CPS,O2 sensor,IAC,
Im at a loss I applied all applicable tips by cruiser and I dont know what to do.
If necessary I would be willing to record all test procedures to make sure I havent been doing something incorrect.