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Crank, no spark, no fuel pump

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Old Jul 19, 2022 | 06:42 PM
  #1  
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Default Crank, no spark, no fuel pump

I have a 95 jeep cherokee 4.0l. One day I went to go to the store it started up. I made it about 100 yards and it shut off and won't start back up. Checked to see if I had spark at coil and no spark and my fuel pump isn't coming on. After reading a lot, I have changed the crankshaft position sensor, the camshaft sensor and the ecm. Still doing the same thing, turns over but won't start cause I have no spark or fuel pump. Any help would be great. Thank you in advance
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Old Jul 20, 2022 | 05:55 AM
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Year: 1997 (RHD)
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1) What brand CPS?

2)Try this:
In your engine bay, remove the starter relay from the PDC. With the key in the OFF position, bridge a jumperlead between sockets for pin 30 and 78.
(The 'sockets' are what I call the parts where the relay pins are pushed into). Does it crank?

3) Now do the same with the key in the ON position. Does it start?




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Old Jul 20, 2022 | 08:57 AM
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awg
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Originally Posted by Rita
I have a 95 jeep cherokee 4.0l. One day I went to go to the store it started up. I made it about 100 yards and it shut off and won't start back up. Checked to see if I had spark at coil and no spark and my fuel pump isn't coming on. After reading a lot, I have changed the crankshaft position sensor, the camshaft sensor and the ecm. Still doing the same thing, turns over but won't start cause I have no spark or fuel pump. Any help would be great. Thank you in advance
I strongly recommend you download this free manual, which has the diagnostic trees for technicians

" Powertrain Diagnostic Procedures Manual" - Jeep Cherokee Forum

You need to indicate if you have measured for voltage input at the suspect sensors ?

It will usually not be present if the ASD relay is dysfunctional. that must have power, and I think it is fused

there is similar data in the FSM

Last edited by awg; Jul 20, 2022 at 08:59 AM.
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Old Jul 20, 2022 | 10:31 AM
  #4  
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From: Ortonville, mi
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Engine: 4.0
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100 % download the FSM, save some time, know what your looking at/for. 😉
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Old Jul 20, 2022 | 07:36 PM
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[QUOTE=Roler;3678122]1) What brand CPS?

2)Try this:
In your engine bay, remove the starter relay from the PDC. With the key in the OFF position, bridge a jumperlead between sockets for pin 30 and 78.
(The 'sockets' are what I call the parts where the relay pins are pushed into). Does it crank?

3) Now do the same with the key in the ON position. Does it start?


Once we are home from work we are gonna try it. Thank you
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Old Jul 20, 2022 | 07:38 PM
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Originally Posted by awg
I strongly recommend you download this free manual, which has the diagnostic trees for technicians

" Powertrain Diagnostic Procedures Manual" - Jeep Cherokee Forum

You need to indicate if you have measured for voltage input at the suspect sensors ?

It will usually not be present if the ASD relay is dysfunctional. that must have power, and I think it is fused

there is similar data in the FSM

So I clicked on the link and now waiting for them to respond to my request to download. Also do you know where I can download the fsm for my 95 jeep cherokee?
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Old Jul 20, 2022 | 07:42 PM
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Originally Posted by Rita
So I clicked on the link and now waiting for them to respond to my request to download. Also do you know where I can download the fsm for my 95 jeep cherokee?
1995 here for free: http://cruiser54.com/?page_id=365
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