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Unread 05-11-2010, 08:37 PM   #1
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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, 08:48 PM   #2
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xjfever's Avatar
1995 XJ Cherokee 
Join Date: Feb 2008
Location: north Ga.
Posts: 14,216
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.
  1. '95 XJ country edition, 4" coils/3/4" spacers, HD leafs with extra main added in, Ironman adjustable control arms, rough country shackles, aussie locker, JK rubicon shocks, 35" mudder's, soft 8's, cobra cb
  2. Sold'99 WJ limited, 4.7L, 3" IRO lift. Bilstein shocks, JK rubicon wheels, 255/70/17's, carolina driveshaft, IRO adjustable control arms, IRO adjustable A-arm
  3. Sold '00 TJ, 4" lift, rusty's adjustable control arms, skyjacker shocks, rock krawler adj. trac-bar,rugged ridge SYE and RE driveshaft, soft 8's, 35" mud king xt's,XJ HP D30 w/aussie locker, 4:88 yukon gears, hella 500's, rock crusher diff covers
4. 04 Dodge ram 1500 quadcab, yes, it has a hemi.
5. '08 BMW X3, Mods in progress.
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Unread 05-11-2010, 09:08 PM   #3
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1990 MJ Comanche 
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 10,932
You can check parts application at
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cps , flex , intermittent , plate , spark

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