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97 4.0 - 2000 4.0 swap!!! Need help

Old 06-24-2018, 01:56 PM
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Model: Cherokee (XJ)
Default 97 4.0 - 2000 4.0 swap!!! Need help


my 2000 4.0 blew and I had a 97 laying around. Did the swap. Everything switched over. Had to make a few new mouths for the engine but that was really it. It will not stay running or barley start. I got it started for about a min on its own. Timming? Does my coil pack rail need to be grounded? Any help please. Engine ran mins before I pulled it
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Old 06-29-2018, 02:41 AM
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Location: Manlius, east of Syracuse, NY
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Year: 2000
Model: Grand Cherokee (WJ)
Engine: 4.0L
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YES! The case of the coil rail needs to be grounded or the high voltage has nowhere to go besides back though the primary windings. Not good. It grounds thru the mounting bolts.
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