Crank, no spark, no fuel pump
07-19-2022, 06:42 PM
#1
Newbie
Thread Starter
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
07-20-2022, 05:55 AM
#2
CF Veteran
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?
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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Rita (07-20-2022)
07-20-2022, 08:57 AM
#3
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Join Date: Mar 2016
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Year: 96
Model: Cherokee (XJ)
Engine: 4.0
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
" 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; 07-20-2022 at 08:59 AM.
The following users liked this post:
Rita (07-20-2022)
The following users liked this post:
Rita (07-20-2022)
07-20-2022, 07:36 PM
#5
Newbie
Thread Starter
[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
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
07-20-2022, 07:38 PM
#6
Newbie
Thread Starter
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
" 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?
07-20-2022, 07:42 PM
#7
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