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replacing cps didn't

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Old Nov 12, 2010 | 10:44 PM
  #16  
Aldakoopa's Avatar
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From: East Lake, NC
Year: 1987
Model: Cherokee
Engine: 4.0
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Try the fuel pump. That's pretty much my next step and I've been replacing everything on this POS... but I love ol' Jesabel.
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Old Nov 13, 2010 | 01:21 AM
  #17  
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

but my fuel pump still works. the fuel pump relay works and no fuses blown. When i turn the car on i hear the fuel pump priming the system
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Old Nov 13, 2010 | 06:35 AM
  #18  
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From: Orange Beach, AL
Year: 1998
Model: Cherokee
Engine: 4.0
Default Throttle body

Have you looked inside your throttle body. If you have alot of buildup in it you might want to get some throttle body cleaner and see if a $3 can will fix your problem. My jeep had the exact problem yours does after throwing hundreds of dollars at I finally cleaned the throttle body and it fired right up. Post back if you try it.
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Old Nov 13, 2010 | 08:53 AM
  #19  
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From: Phoenix AZ
Year: 1997
Model: Cherokee
Engine: I6ho
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As others have said, it sounds like a fuse, or possibly the ASD module.
This has happened to my rig twice in the 13 years I've ownerd it... both times it was the ASD.
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Old Nov 13, 2010 | 10:10 AM
  #20  
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From: East Lake, NC
Year: 1987
Model: Cherokee
Engine: 4.0
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Originally Posted by goblinish15
but my fuel pump still works. the fuel pump relay works and no fuses blown. When i turn the car on i hear the fuel pump priming the system
Yeah, mine runs too. It might not be pumping enough to get it started, but I don't have a fuel pressure gauge to test it... =/
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Old Nov 13, 2010 | 12:24 PM
  #21  
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

I have fuel pressure i took off the bike cap lookin thing and pushed down the little thing inside and fuel came out so i know i have pressure and fuel
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Old Nov 13, 2010 | 12:26 PM
  #22  
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

Originally Posted by Frugal
Have you looked inside your throttle body. If you have alot of buildup in it you might want to get some throttle body cleaner and see if a $3 can will fix your problem. My jeep had the exact problem yours does after throwing hundreds of dollars at I finally cleaned the throttle body and it fired right up. Post back if you try it.

i've nnever worked on the throttle body.............How do i get to it? how do i do it?
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Old Nov 13, 2010 | 09:46 PM
  #23  
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From: Orange Beach, AL
Year: 1998
Model: Cherokee
Engine: 4.0
Default throttle

Originally Posted by goblinish15
i've nnever worked on the throttle body.............How do i get to it? how do i do it?
Just follow the big flex hose from your air filter to the engine, the hose connects to the throttle body on the engine. Loosen the hose and pop it off. Turn the butterfly so its open and look down in the throttle body if it looks black you probably need to clean it. Some people take it off and tear it apart to clean it, I was broke down in bad part of town when mine stopped running so I sprayed it without taking the throttle body off which didn't seem to hurt it any and its ran fine since then. Most throttle body cleaner comes with a little straw that you stick in the spray nozzle, I just pointed it down in the TB and sprayed all around real good and let in soak for a minute or two then sprayed it again. Mine started right up but had to let it run for a few minutes to let the cleaner blow out the tail pipe so don't freak out if it runs a little rough when it first starts.
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Old Nov 13, 2010 | 09:53 PM
  #24  
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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you are getting spark right
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Old Nov 14, 2010 | 12:55 AM
  #25  
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

yes
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Old Nov 14, 2010 | 02:16 AM
  #26  
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question



Is this bad? or good? clean or dirty?
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Old Nov 14, 2010 | 02:32 AM
  #27  
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

? could this REALLY stop my rpms and just shut down my car and make it crank and crank and not turn fire up? cuz obviously the cps want my problem.
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Old Nov 14, 2010 | 03:47 AM
  #28  
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From: Locust Grove, VA
Year: 1991
Model: Cherokee
Engine: I6 4.0 HO
Default

It could be the ECM module. I had to replace everything in the ignition chain, pulled out the Haynes and found the ECM is also a part of the chain. And just dumb luck it started up after I swapped it, 1990 XJ.
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Old Nov 14, 2010 | 07:46 AM
  #29  
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From: Orange Beach, AL
Year: 1998
Model: Cherokee
Engine: 4.0
Default throttle body

Originally Posted by goblinish15
? could this REALLY stop my rpms and just shut down my car and make it crank and crank and not turn fire up? cuz obviously the cps want my problem.
If you get enough of that buildup on your sensors inside the throttle body it will crank all day long but never stay running
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Old Nov 16, 2010 | 12:57 AM
  #30  
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

do u spray it into the little holes by the plate? and just everywhere?
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