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Old 09-01-2008, 06:01 PM   #1
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4.0 ho timing?

hey anyone and everyone, if you can, how do you adjust the timing on an 4.0 engine, mine is out of a 93 cherokee!

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Old 09-01-2008, 08:48 PM   #2
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Engine timing on '89 and newer Cherokee (and 91 and newer YJ) 4.0L engines is under 100% control of the PCM (engine computer) and you cannot adjust it. Even if you rotated the distributor in an attempt to adjust the engine timing, the PCM will correct the timing back to what it wants it to be.
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