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Fuel Pump? Crank Positioning Censor?

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Old Nov 14, 2014 | 01:44 PM
  #1  
Bobthemotorcycle's Avatar
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From: N.W. Arkansas
Year: 1996
Model: Cherokee
Engine: 4.0
Default Fuel Pump? Cam Positioning Censor?

If my fuel pump goes bad will it also make the Automatic Shutdown activate and keep me from having spark.


I just added fuel but the needle did not move. I checked the dash instruments fuse and it is good and tight.


How do I know if my Crank Positioning Censor is bad? I looked at it and nothing out of order. I wiped a little grease off of it and re installed.


EDIT: I mistakenly wrote CRANK positioning censer but meant to say CAM positioning censer.

Last edited by Bobthemotorcycle; Nov 14, 2014 at 03:47 PM.
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Old Nov 14, 2014 | 03:45 PM
  #2  
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From: Saginaw Mi area
Year: 1994
Model: Cherokee
Engine: 4.0
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According to what I've found, the ASD runs a lot of "stuff" ! including fuel pump relay, ALT field etc...

The PCM runs the ADS ground circuit for the IGN coil too...

Is the fuel pump not running at all ? If the gauge isn't reading, maybe look at the wiring at the gas tank sending unit, and the GROUND for that sender & pump...
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Old Nov 14, 2014 | 03:48 PM
  #3  
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EDIT: I mistakenly wrote CRANK positioning censer but meant to say CAM positioning censer.
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Old Nov 14, 2014 | 04:02 PM
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From: Saginaw Mi area
Year: 1994
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Engine: 4.0
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Is the fuel pump not running at all ? If the gauge isn't reading, maybe look at the wiring at the gas tank sending unit, and the GROUND for that sender & pump...
That ground for that harness is is in a splice, located on the left sidewall, just ahead of the lift gate opening, where a bunch of wiring comes together...

Last edited by steelybill; Nov 14, 2014 at 04:13 PM.
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Old Nov 14, 2014 | 04:12 PM
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From: Saginaw Mi area
Year: 1994
Model: Cherokee
Engine: 4.0
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Cam position sensor is in the distributor, with ( I believe) three wires coming out the side of the dist. I guess you could remove the cap & look at the sensor & wiring etc...and where it runs into the harness..
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