SOURCE: 2001 Jeep Grand Cherokee code P1391
I would check to be sure that the timing chain hasn't jumped at all ..
SOURCE: 96 dakota p1391 error
intermittent loss of ckp or cmp.problem is in the distributor.make sure rotor not loose or distributor hold down bolt loose.camsensor on the distributor.also check to see if crank sensor is loose and out of adjustment.
SOURCE: I went to auto zone
one is the crank sensor,m the other is the cam sensor-which was it? you should get the actual code so there is no doubt, if you are having a hard time getting it started, it is probably a crank sensor, if it only manifests itself when running it could be either crank or cam sensor.
SOURCE: i have a jeep grand
I would change the TPS throttle position sensor and the Map/MAF are you sure its not the mass air flow?. I think your computer is fine it could be have a loose ground issues but computers dont go bad.
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