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Distributor Timing Issue.

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Old 05-17-2018, 02:34 PM
  #1  
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Location: Albuquerque, NM
Posts: 34
Year: 1997
Model: Cherokee
Engine: 4.0l
Default Distributor Timing Issue.

Hey all let me first thank anyone in advance that is willing enough to post on this thread and try to help out.

So the issue that i have right now is timing the distributor. The distributor wants to land about a 1/4” off every time. Let me explain. So first off i will tell everyone what i have done to get it timed to this point so far “as i dont think this is going to be a simple fix”. So I have set my HB to 0° while the number one piston is on TDC conpression stroke. I then set the oil pump slot to about 11o’clock and align the cam sensor to the correct indexing hole. I drop the distributor in and it will land about a 1/4” off no matter what advanced or retarded. I have found two other threads on the net explaining the same issue as well as a video. I will post all those links so there is better explanation.

Example Post 1
Example Post 2

so now that i hope you all understand the issue im experxiecing let me give you all the info i have.

The engine is originally out of a 92 Cherokee. I swapped it into a 97 cherokee ran great and then the timing chain snapped. I replaced the timing chain and got it running with backfiring/timing issues. Took it to my personal mechanic and he told me he had to adjust the distributor timing by about 3° and it had ran fine ever sense. I just recently swapped this same motor into my 98 cherokee. I had to swap the distibutor so that the cam sensor would work with my new wiring harness. Like a bafoon i did not mark my distributor before removing it. So now i am experiencing the issue explained above. I have ran it with the cam sensor advanced about a 1/4” and retarted a 1/4” and it ran both ways but will backfire in higher rpms and lacks power. It will stop running after about half an hour of run time also. I have also tried to do it 180° out just to be safe both being advanced and retarted on the cam sensor also. “When i say cam sensor im really talking about the white pickup ring with holes that is located underneath the cam sensor” i have tried everything. If i try to get the pickup holes ro align correctly like the books call for i can but the hold down clamp on the distinutor does not align with the bolt hole. Any help is greatly appreciated.
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Old 05-17-2018, 09:10 PM
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Take a long screwdriver and position the slot in the oil pump to 11 o'clock, and try again. If you dont get it right the first time, keep turning the slot in the oil pump until you do. The distributor will want to land in whatever position that slot is in. If its off, the distributor wont land where it needs to be. There are holes next to the pulse ring to hold the distributor body and shaft steady for this very reason. One is for the 4.0L, and one is for the 2.5L.

http://www.jeepforum.com/forum/f11/d...ssues-3200865/ Post #3

Last edited by fb97xj1; 05-17-2018 at 09:17 PM.
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Old 05-18-2018, 01:40 AM
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Year: 1997
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Originally Posted by fb97xj1 View Post
Take a long screwdriver and position the slot in the oil pump to 11 o'clock, and try again. If you dont get it right the first time, keep turning the slot in the oil pump until you do. The distributor will want to land in whatever position that slot is in. If its off, the distributor wont land where it needs to be. There are holes next to the pulse ring to hold the distributor body and shaft steady for this very reason. One is for the 4.0L, and one is for the 2.5L.

http://www.jeepforum.com/forum/f11/d...ssues-3200865/ Post #3

I appreciate your help, although i have very much tried literally now over 100 times of dropping it in. No matter what it will land one tooth off advanced or retarted by one. Im starting to think that possibly it has worked fine advanced by one tooth and that my issue lies somewhere else. Ill post on this thread oncd i have it figured out. Thanks again.
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