please help I put a new fuel pump and computer in my 98 Cherokee sport it rolls over but no spark or new pump does not run can any one point me in direction to look?

 

checked for power at fuse block under hood getting juice there just not at plugs or back to fuel pump any suggestions

 

Just what is your basic problem? Won't Start? Replace the crankshaft Position Sensor, and the Camshaft Positon Sensor. If this don't fix it change the PCM.

 

I changed the pcm with a new reprogramed one and brand new fuel pump will crank over but no spark or power back to pump

 

The typical culprit for this problem is the Crankshaft Position Sensor (CPS).

If you decide to change it I would highly recommend a Mopar (Dealer) CPS, not some aftermarket CPS.

Why did you change the PCM? Some other issue?

 

hooked up obd reader to the jeep and it couldn't communicate with computer so I replaced computer it all started I drove to work it ran fine turned it off went to work for 8 hrs came back went to start and nothing just cranked over so first thought was fuel pump went bad replaced with brand new one that wasn't it was told to check ecm probably went bad so replaced that and still nothing please help