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the crank sensors can be finicky bitches… make sure they put a quality one on it from napa or oreilly, i've had advance auto ones be bad out of the box and really throw you off.. kinda sounds like it might be just loose, extra vibes from driving causing problems, but they can wear out too and not oscillate correctly in the housing also.those are the only two sensors that will stop a 4.0 from running… the other one that will cause problems is the MAP sensor, if theres a problem with it, the motor won't rev above 3500 or so and is usually associated with a vacuum leak.The 4.0s are great motors for what they are, i've had ton of fun with them. hope you get it going
the crank sensors can be finicky bitches… make sure they put a quality one on it from napa or oreilly, i've had advance auto ones be bad out of the box and really throw you off..
kinda sounds like it might be just loose, extra vibes from driving causing problems, but they can wear out too and not oscillate correctly in the housing also.
those are the only two sensors that will stop a 4.0 from running… the other one that will cause problems is the MAP sensor, if theres a problem with it, the motor won't rev above 3500 or so and is usually associated with a vacuum leak.
The 4.0s are great motors for what they are, i've had ton of fun with them. hope you get it going
