cherokee will not rev up

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Apr 18, 2009 | 07:46 AM
  #16  
im about ready to get a junk yard motor and dump this one in the river
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Apr 18, 2009 | 09:38 AM
  #17  
Actually, on all the obdI chrysler products i've played with, i've never seen a CPS throw a code...

That problem you're describing is similar to a situation I experieced on a 99 with a bad MAP sensor, it didn't throw a code either. Unplug the MAP and start it, see if the problem gets better.
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Apr 18, 2009 | 10:53 AM
  #18  
well i unplugged the cps and it wouldn't start. ill go mess with the map sensor now and see how that goes. thanks.
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Apr 18, 2009 | 11:10 AM
  #19  
it wouldnt start with the map unplugged and dies when you unplug it while its running.
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Apr 21, 2009 | 05:44 PM
  #20  
if its not getting a signal from the map then i dont think it will start
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Apr 21, 2009 | 06:54 PM
  #21  
Quote: if its not getting a signal from the map then i dont think it will start
Nope.

The MAP gets it's "baro" reading for atmospheric pressure (elevation) right at key-on. Having it unplugged will make it go full-lean and not start.
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Apr 21, 2009 | 11:32 PM
  #22  
What is the fuel pressure? Also, Renix (87-90) won't show check engine light, there ISN'T a check engine light. The Emmissions Maint light is set by time only...
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Apr 22, 2009 | 06:26 PM
  #23  
well i took it apart to see what the timing chain looked like and it was f***ed it hadn't jumped a tooth yet but it had allllooooott of play like an inch or more. so im just going to replace that. i dont have a fuel pressure gauge but the only thing i haven't replaced in the fuel system is the regulator that is going to be a jy steal shortly. should i grab a map sensor while im at it?
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