bigdaddyjlove
NAXJA Forum User
- Location
- Atalanta
Hello all
Blew up engine back in March. Due to the current unpleasantness, the build and swap took a little longer than I had planned. The engine has been in the jeep for over a month at this point and it will not run correctly. It will crank and run after some extended cranking. Once running, it idles perfectly. It will NOT rev past 1800. Any attempt to rev causes stumbling, popping etc..
It moves fine in
Spec:
1996 Jeep XJ. AW4 Auto.
4.6L Stroker.
After thorough inspection re-used the crank and cam from the previous engine - Using same combination of parts from previous engine. Only carried over crank and cam. I have only managed to get one CEL code. One stumble and die resulted in an intermittent cam/crank missmatch. Will not repeat the code.
1. late model 258 crank
2. Crane Camshaft that does not seem to be made anymore. Apologies. Don't have the number, but it was their "tourquey" cam from 2008.
3. Stock 258 rods
4. New Sealed Power 802 pistons .030 over
5. Stock '98 head
6. Renix era engine block, bored to match new pistons
What I have done/checked
1. Rechecked cam timing. Verified by second set of eyes.
2. Rechecked ignition timing. Verified by second set of eyes.
3. Swapped ignition coil from running jeep
4. Swapped distributor from running jeep
5. Swapped Crank sensor from running jeep
6. Swapped Cam sensor/ignition pickup from running jeep
7. Swapped Throttle position sensor from running jeep
8. New cap/rotor/wires/plugs.
9. Checked fuel pressure at idle. 48 psi. Need second set of hands. Have not checked while trying to throttle. Will do ASAP
10. Unhooked exhaust at collector to check for plugged cat.
So far nothing seems to make any changes.
I am open to any ideas. I have several other XJs, so some quick swaps can be made
I am stumped, any help is appreciated.
Blew up engine back in March. Due to the current unpleasantness, the build and swap took a little longer than I had planned. The engine has been in the jeep for over a month at this point and it will not run correctly. It will crank and run after some extended cranking. Once running, it idles perfectly. It will NOT rev past 1800. Any attempt to rev causes stumbling, popping etc..
It moves fine in
Spec:
1996 Jeep XJ. AW4 Auto.
4.6L Stroker.
After thorough inspection re-used the crank and cam from the previous engine - Using same combination of parts from previous engine. Only carried over crank and cam. I have only managed to get one CEL code. One stumble and die resulted in an intermittent cam/crank missmatch. Will not repeat the code.
1. late model 258 crank
2. Crane Camshaft that does not seem to be made anymore. Apologies. Don't have the number, but it was their "tourquey" cam from 2008.
3. Stock 258 rods
4. New Sealed Power 802 pistons .030 over
5. Stock '98 head
6. Renix era engine block, bored to match new pistons
What I have done/checked
1. Rechecked cam timing. Verified by second set of eyes.
2. Rechecked ignition timing. Verified by second set of eyes.
3. Swapped ignition coil from running jeep
4. Swapped distributor from running jeep
5. Swapped Crank sensor from running jeep
6. Swapped Cam sensor/ignition pickup from running jeep
7. Swapped Throttle position sensor from running jeep
8. New cap/rotor/wires/plugs.
9. Checked fuel pressure at idle. 48 psi. Need second set of hands. Have not checked while trying to throttle. Will do ASAP
10. Unhooked exhaust at collector to check for plugged cat.
So far nothing seems to make any changes.
I am open to any ideas. I have several other XJs, so some quick swaps can be made
I am stumped, any help is appreciated.