Question about 1996 Jeep Grand Cherokee

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I replaced my cps 'crank position sen'' on my 1996 jeep cherokee about 6 months ago.now its doing the samething.it's cutting out going down the road and if i try to give it gas it backfires.i can hear the transmision tapn it''cps''.when i got the new one i had to order the paprer spacers.there were 8 to 10.i was only able to use 2 or 3 because of limited work space.how many does it take to get it in the right position?

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The reason they give you so many is because that number varies. You know that you don't have enough because it is hitting, but, since it lasted this long, you must be pretty close. the sensor will usually work with up to 1/4" clearance so if you add a few more, you should be OK, unless something is allowing the flywheel to move where it should not.(unlikely)

Posted on Sep 24, 2009

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Does a 1997 jeep grand cherokee lerado with distributor have a crank shaft sensor?


If you are losing power to the coil, the problem is not the CPS. The CPS only times the negative pulses to the coil. The positive is provided thru the ASD relay. The PCM may be shutting off the ASD relay for several reasons. It could just be a bad ground wire from the PCM to the relay box, a bad ground to the PCM, or perhaps the security system acting up. A way to bypass these problems is to cut the ground wire and ground it directly to the firewall.
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Jan 29, 2012 | 1997 Jeep Grand Cherokee

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I have a 1996 jeep grand cherokee. I have just replaced the tps (throttle position sensor) on it a couple of months ago. About a month ago I was riding down the road and the RPM's would go to zero and the...


It could be the Crank Position Sensor. But that just a guess. BUT.... they are common to go bad, buy one from the dealer, most aftermarket parts (non dealer) are not good.

Aug 27, 2010 | 1996 Jeep Grand Cherokee

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The power is on and off so starting is hard


Need to try the crank shaft position senor. It work off the turning of the crank. It the sensor goes bad then the engine has no idea what position the crank is in, so therefore you won't get it to start. I had to replace a few of these on Jeeps , this is a big problem for Jeeps.

Jul 05, 2010 | 1996 Jeep Grand Cherokee

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I have a 1966 jeep cherokee lored do. the engine will turn over but not start. this would occasionally occur, but now is happening more freqently. i have replaced the cam sensor but it still won't...


It sounds like you need to replace your CPS (crankshaft positioning sensor.) You certainly don't want to have that fail for good on you when you are out on the road.


If it is the malfunctioning CPS, the reason your Jeep won't start is because it thinks it is already on.

Jun 25, 2010 | 1996 Jeep Grand Cherokee

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The car won't stay on without giving it gas


Jeep Cherokee Limited Crank, No Start
Q. Hi! The Jeep has periods when it will not start for a couple days (cranks fine but won't fire), then it will mysteriously start again. A friend suggested that it may be the CPS - I checked it has 200 oM - when I'm cranking by hand it's little bit changing - it should be OK. But again, wouldn't this also effect the engine during those times that it was running?
mechanic.jpg This problem occurs during rainy and sunny weather so I don't think it's a moisture or water intrusion problem. Is there any part of the ignition system that only affects starting that could be causing this problem?
  • 1989 Jeep Cherokee Limited
  • 4.0 liter
  • Automatic transmission
  • 170,000 miles
I found some forum where some guy had the same:
"I am having the same or similar problem with my wifes 1990 Cherokee. I have found a place that tests the ICM. It may take a while to find a place in your area. I suggest you go in person and talk to the people in your better parts stores.
I have been unsuccessful so far in finding the fault. My ICM has been tested twice and passed both times. I have power to the ICM and the coil checks within parameters. This has been a very frustrating problem for me. I'm about ready to drive it off a cliff and call it a day. Good luck."

So my question is; what is the reason of that? Thanks for help...
Pawel
A. This was a widespread problem for Chrysler and they issued a couple of TSBs to address the problem. The first was:
Models:
1989 MJ & XJ Bodies
Subject:
4.0L No-Start, Hard Restart, or Engine Die-Out. Vehicles Equipped With Automatic Transmission Only.
Index:
DRIVEABILITY
Date: December 29, 1989 No.: 18-57-89 (C18-23-9) P-14 Body Code Legend:
MJ - COMANCHE (RWD, 4WD) XJ - CHEROKEE/WAGONEER (RWD, 4WD)
SYMPTOM/CONDITION:
Some 1989 vehicles equipped with the 4.0L engine and automatic transmission may experience an engine no-start, hard restart, or an engine die-out. This condition may be caused by low signal strength from the crank position sensor due to a larger than desired distance to the flywheel sensing ring.
DIAGNOSIS:
42257289.gif Check to see if the vehicle has a slotted crank position sensor:
  1. If the vehicle is equipped with a slotted crank position sensor (see Figure 1), check to see if the CPS grommet on the top of the transmission bell housing has been updated (see Figure 2). If the CPS grommet has not been updated, replace the CPS grommet per the Repair Procedure outlined below.
If the vehicle has a slotted crank position sensor and new CPS grommet, do not install a new sensor, but reinstall the slotted sensor that was on the vehicle and verify that it is good using procedures in the 1989 Jeep Service Manual 81-370-9045 on page 14-87.
  1. If the vehicle does not have a slotted crank position sensor already installed, then proceed with the Repair Procedure.
PARTS REQUIRED:
1 Crank Position Sensor (slotted) P/N 83100067 1 Crank Position Sensor Grommet P/N 83100068 REPAIR PROCEDURE:
  1. Turn the ignition switch to the "OFF" position.
  2. Disconnect the Crank Position Sensor (CPS) from the engine harness.
  3. Raise the vehicle using a lift.
  4. Remove the old CPS and grommet.
  5. Install the new CPS grommet.
NOTE: THE NEW CPS GROMMET MUST BE REPLACED SO THAT THE MAXIMUM SIGNAL OUTPUT CAN BE OBTAINED FROM THE NEW CRANK POSITION SENSOR.
  1. Install the new Crank Position Sensor and loosely attach the retaining bolts.
  2. Firmly press down on the slotted hole side of the CPS until it bottoms on the machined lip of the bellhousing. While holding the CPS down against the bellhousing, tighten the bolt on the slotted side of the CPS to 16 ft.lbs.
  3. Tighten the remaining attaching bolt to 16 ft.lbs.
NOTE: MAKE CERTAIN THAT THE CRANK POSITION SENSOR IS COMPLETELY BOTTOMED ON THE MACHINED LIP OF THE BELLHOUSING AND IS AS CLOSE AS POSSIBLE TO THE FLYWHEEL SENSING RING WITHOUT CONTACTING IT.
  1. Secure the lead of the CPS to the retaining clip on the bellhousing to prevent its contact with the exhaust manifold.
  2. Lower the vehicle.
  3. Connect the CPS to the engine harness.
If this repair has been made, or hasn't fixed the problem, the other TSB is 18-54-89 REVISION A recommending cleaning of the throttle body assembly, DIY: Cleaning Throttle Bodies, and replacement of the PCM.
PARTS REQUIRED:
1 ECU (Automatic Transmission) P/N 53007842 1 ECU (Manual Transmission) P/N 53007843 1 Mopar Choke and Linkage Cleaner P/N 4549619

Dec 03, 2009 | 1996 Jeep Cherokee

1 Answer

2000 Jeep Grand Cherokee Larado


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1 Answer

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1 Answer

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