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I have an 02 Jeep Grand Cherokee which shut down while driving and won't start back I have replaced throttle position sensor, mass air sensor, crank sensor, computer and also cleaned throttle body. I have pulled spark plug and getting no fire also can't hear fuel pump engage. Please help!

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Check the module that makes the spark plugs fire. Check the fuses first.

Posted on Nov 12, 2014

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  • 49 Answers

Check the ignition module, could be in the steering column, could also be a anti theft condition.

Posted on Nov 12, 2014

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Posted on Jan 02, 2017

nobodyrick
  • 1 Answer

SOURCE: 96 jeep grand cherokee 4.0

I ve put coil pickup' crank sensor' coil still no power to fuse block on finder' no fire to plugs ' don't here fuel pump, this is on one another one blows fuse to the firing ever time I turn the switch on

Posted on Dec 09, 2013

  • 3 Answers

SOURCE: PO171 OBD-II Trouble Code " System Lean To Bank 1

Check PCV valve and be sure it is not stuck open.  Check for vacuum leak at intake manifold.  

Posted on Jan 01, 2009

Mikey108
  • 475 Answers

SOURCE: 2002 Jeep Grand Cherokee Lardo misfiring

You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.

Posted on Feb 24, 2009

emissionwiz
  • 75005 Answers

SOURCE: '97 Jeep Grand Cherokee Ltd 4.0 liter; Will start but cuts off.

have u replaced the crankshaft position sensor? do u have any computer trouble codes? Kragen or Autozone will run the test for free.

Posted on Mar 12, 2009

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SOURCE: 1998 Jeep grand Cheroke hard cranking, sputtering, rough idling

In READING what you wrote, it appears that your car is difficult to start and pretty much is rough while running....It also appears that your are randomly replacing parts...How did you verify that the parts your have replaced had failed? I suggest you get a basic manual like chiltons or haynes as well as a decent digital volt/ohmeter, then do some testing. Pay close attention to map sensor test and manifold air temp. Having a good fuel pump does not insure that your injectors are clean enough to deliver a good spray pattern This will not show up on any test...you need to actually look at them. There are other items to look at but I think you will likely find your problem in what i mentioned. (you already checked for vacuum leaks, right?)
Good luck!

Posted on Jul 27, 2009

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1 Answer

2003 jeep grand cherokee with idle issues


Throttle Position Sensor? Has that been replaced? Relatively inexpensive and easy to do yourself..

Cleaned the Air Mass Flow Sensor?

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Have the spark plugs and wires been checked?

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I would change the TPS throttle position sensor and the Map/MAF are you sure its not the mass air flow?. I think your computer is fine it could be have a loose ground issues but computers dont go bad.

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Hello where is the crankshaft position sensor on a 1995 jeep grand cherokee? My jeep would stall out but start right up now it wont start at all even though its trying to. i replace the ignition coil...


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Ok... using a digital ohmeter (if you don't have a scan tool) check the throttle position sensor, mass air flow sensor and the manifold pressure sensor (MAP). Instructions for testing are too long for me to write them out, but can be found in any decent repair manual. As a last resort, you can swap parts from another known good vehicle (maybe from a friend) this won't damage anything unless you break something during r&r. I'm leaning towards the tps, but on this electronic junk, everything feeds off of everything else and it's easy to get fooled... could even be the crank sensor. Sorry to be so vauge but without being there and driving/testing myself I can't honestly be positive enough for a definite answer. (you did change the fuel filter, right?)

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