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lets make this simple............

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Old 11-30-2010 | 01:01 AM
  #1  
goblinish15's Avatar
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question lets make this simple............

driving down the road. press on the gas and had no response just slowed down and idled down the road. stopped on the road and just idled. then shut off now it just cranks and cranks.....already replaced the cps
Old 11-30-2010 | 01:33 AM
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

bad tps of fuel pump.............it HAs to be one of those!!!!! ideas people?!?!?!
Old 11-30-2010 | 01:40 AM
  #3  
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

the second it came to a stop i shut if off.....so idk if it would have kept idling.....if i had a bad tps well it would still start so my final guess is the fuel pump. i have limited moneys and skills butafter have going through everything i know about and checked im guessing fuel pump.
Old 11-30-2010 | 01:48 AM
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

1 last thing.........perfect spark and ignition haha
Old 11-30-2010 | 04:02 AM
  #5  
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From: hampton va
Year: 87
Model: Cherokee
Engine: 4.0
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when you turn the key do you hear the fuel pump run for a sec.?
Old 11-30-2010 | 04:03 AM
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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he has spark he has fuel the only thing he ahas not checked is injector pulse there is a nother post of this its listed under sensor
Old 11-30-2010 | 05:48 AM
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From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
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If you have verified that you have a strong, snapping blue spark then you MUST concentrate on fuel delivery to the fuel injectors.

Try spraying a small amount of starting fluid or a bit of gas into the intake. If the engine starts and runs momentarily, you have verified that you have a fuel delivery problem.

That problem could be an issue with the fuel pump itself (check pressure at rail with a fuel pressure gauge) OR it could be that you have good pressure at the rail, but the control electronics aren't allowing the fuel to make it TO the fuel injectors.
Old 11-30-2010 | 09:52 PM
  #8  
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

i hear the buzz from the fuel pump. i sprayed the throttle body cleaner in the valve and other parts.......i have starter fluid. i will try it but uhm. Wont the throttle body cleaner do the same thing as starting fluid?
Old 11-30-2010 | 09:56 PM
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From: cape cod ma.
Year: 1998
Model: Cherokee
Engine: 4.0 i6
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ok i had the iac motor go on mine try holding the gas pedal at 1/4 throttle and cranking it..or you may be needin a tps
Old 11-30-2010 | 10:04 PM
  #10  
goblinish15's Avatar
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

ive tried the pedal in everyway and the tps wont keep a carfrom starting
Old 11-30-2010 | 10:15 PM
  #11  
Ender's Avatar
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From: Southern California
Year: 1989 Laredo
Model: Cherokee
Engine: 4.0 Inline 6 Renix
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I don't think throttle body cleaner is as flammable as starter fluid.... correct me if I'm wrong....
Anyway, sounds like TPS, from what you said about the engine idling down the road with no response from you pressin' on the gas pedal.......
Old 11-30-2010 | 10:35 PM
  #12  
goblinish15's Avatar
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

hmmmmm ive read it can still start with bad tps..........any idea?
Old 12-01-2010 | 06:50 AM
  #13  
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From: cape cod ma.
Year: 1998
Model: Cherokee
Engine: 4.0 i6
Default

your next step is a noid light to check for injector pulse
Old 12-01-2010 | 10:35 PM
  #14  
goblinish15's Avatar
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From: McCall,Idaho
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
Question

tried starting fluid annnnnnd NOTHING!!!!!!!!!!!!!!!!!! i have spark and fuel is not my problem sooooo pressure or air?
Old 12-01-2010 | 10:37 PM
  #15  
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Joined: Mar 2010
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Default

tow it to the clossest repair shop


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