Question about 2001 Jeep Grand Cherokee
P0320-NO CRANK REFERENCE SIGNAL AT PCM
When Monitored: During engine cranking.
Set Condition: No signal from the crankshaft position sensor is present during engine
cranking, and at least 3 camshaft position sensor signals have occurred.
Replacing the crank sensor will get you going again.
Hope i helped you.
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Posted on Dec 13, 2009
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Posted on Jan 02, 2017
First, if the noise is from the upper part of the engine and is more of a tapping than a knock, likely you have a problem in the valvetrain, most often a bad lifter or worn rocker arm. If the noise is low, deep inside, the noise is from a bearing. This is generally accompanied by lower than normal oil pressure. Regardless of the underlying cause, correcting the cause will not stop the knock. To do that correctly, the engine needs to be removed and all crankshaft bearings and the crankshaft itself need to be replaced (crank can sometimes be "undercut" and thicker bearing shells can be used depending upon the amount of wear.) If caught very early, sometimes only one bearing can be replaced in-car, but in 99% of all cases I have ever seen, most will fail again, sometimes more severely if done this way.
Posted on Dec 10, 2009
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