lets make this simple............
11-30-2010, 01:01 AM
#1
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Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
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
11-30-2010, 01:33 AM
#2
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Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
bad tps of fuel pump.............it HAs to be one of those!!!!! ideas people?!?!?!
11-30-2010, 01:40 AM
#3
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Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
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.
11-30-2010, 04:03 AM
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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
11-30-2010, 05:48 AM
#7
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Year: 1999
Model: Cherokee
Engine: 4.0
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.
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.
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11-30-2010, 09:52 PM
#8
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Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
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?
11-30-2010, 10:04 PM
#10
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Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
ive tried the pedal in everyway and the tps wont keep a carfrom starting
11-30-2010, 10:15 PM
#11
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Year: 1989 Laredo
Model: Cherokee
Engine: 4.0 Inline 6 Renix
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.......
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.......
12-01-2010, 10:35 PM
#14
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Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
tried starting fluid annnnnnd NOTHING!!!!!!!!!!!!!!!!!! i have spark and fuel is not my problem sooooo pressure or air?
