melwade
NAXJA Forum User
- Location
- Sacramento, CA
I've just put a rebuilt engine into my 1990 XJ w/4.0 automatic. It starts, but runs really rough. If you try to increase the throttle it runs slightly weaker without any increase in rpm's. I talked to the place I purchased the engine from today and they immediately targeted the Crankshaft Position Sensor.
That got me thinking about the "flywheel" and all the holes in it that the CPS uses. I checked my factory service manual so see if it said anything about the alignment of the flywheel and it was mum on the subject. So I'm asking... Is the alignment (in relationship to the crank) an issue?
We've double checked the distributor alignment and the injectors are connected correctly. We've checked compression and it's good at 140psi in each cylinder. We checked the plugs (new) and they are all fouled with black soot. All the vacuum hoses have been checked and double checked.
Am I missing something else?
That got me thinking about the "flywheel" and all the holes in it that the CPS uses. I checked my factory service manual so see if it said anything about the alignment of the flywheel and it was mum on the subject. So I'm asking... Is the alignment (in relationship to the crank) an issue?
We've double checked the distributor alignment and the injectors are connected correctly. We've checked compression and it's good at 140psi in each cylinder. We checked the plugs (new) and they are all fouled with black soot. All the vacuum hoses have been checked and double checked.
Am I missing something else?