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91 running rough in drive, stalls and wontstart until cold

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Old 07-02-2019, 02:00 PM
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Year: 1991
Model: Cherokee
Engine: 4.0 HO
Default 91 running rough in drive, stalls and wontstart until cold

91 4.0 auto. Started to feel like it was a lose wheel as it would vibrate. Slipped it into N and that stops. However it was losing idle and stalling out. I cleaned the TB and the TPs. Also replaced fuel filter and pump. Ive seen a few threads on a sumilar issue but none reported the vibration which was at a constant frequencey at same load.
Ideaa? Probably not related but i changed out tge starter a few days before this came up.
Old 07-02-2019, 03:50 PM
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Year: 1995
Model: Cherokee(XJ)
Engine: I6 4.0L
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The common fault for a "stalls and won't restart until engine cools down" is a bad CPS.

However in your case, I feel like there's more going on and it's probably transmission related. What is the condition of the ATF in your tranny?
Old 07-02-2019, 08:20 PM
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Year: 1991
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I just put in a CPS. Still wont start.

Tranny fluid is clear.

Not throwing codes.
Old 07-02-2019, 09:14 PM
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Guage over stated at 1/8 tank but was dry
Got it running but with stutter etc
Home so thats good
Old 07-03-2019, 04:23 PM
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Year: 1991
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Put in my spare ECM. cleared it up. still not as smooth as it was but drivable now
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