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Go Back JeepForum.com > Models > Jeep Cherokee & Comanche Forums > XJ Cherokee Technical Forum > no problem like someone elses problem

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Unread 05-11-2010, 07:37 PM   #1
too_low
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1998 XJ Cherokee 
 
Join Date: May 2010
Location: Wayland
Posts: 43
no problem like someone elses problem

I just bought a 91 jeep Cherokee Laredo from a guy who tried to put an engine in it. from what I gather the old engine overheated and blew up so he bought a junkyard engine out of a 1995 jeep?????? He said he used the wiring harness and ecu from the 91. everything works correctly (fuel starter lights) except for the ignition and the tach, he put a new 91 distributor on it and it only has spark on #3 and 4 cylinders, i put a distributor off of a 94 jeep grand Cherokee in it and it only has spark on #2 and 5 cylinders now. The combination of wrong spark timing and the tach not working points to the crank position sensor, however it's new. Is there a possibility that the flex plate from a 95 is different from a 91 and could that cause the cps to read the position wrong?? Thanks

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Unread 05-11-2010, 07:48 PM   #2
xjfever
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1995 XJ Cherokee 
 
Join Date: Feb 2008
Location: north Ga.
Posts: 14,212
I would assume that you need a 91 flexplate, distributor, and CPS to make it work correctly. I am unsure if the 91 and 95 are different but there were different ones for different years.
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Unread 05-11-2010, 08:08 PM   #3
cruiser54
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1990 MJ Comanche 
 
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 10,163
You can check parts application at rockauto.com.
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cps , flex , intermittent , plate , spark

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