Question about 1993 Jeep Grand Cherokee

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My jeep grand cherokee will not run

Cut off converter. Changed plugs wires. Put new Crank Pos Sencor

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  • 56 Answers

You may need to put a new converter in since there is likely a down stream O2 sensor that takes readings after the converter.

Posted on Nov 01, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 41 Answers

SOURCE: P0420 2003 Jeep Grand Cherokee 4.0 6cyl

This code is a catalyst efficiency code. The catalytic converter is most likely the problem, but it could still be caused by a defective oxygen sensor. The easiest way I know to check for this code is with a scan tool that is capable of reading live data stream. You need to look at the upstream and downstream oxygen sensors, and see if they are mirroring each other. In other words, if the upstream (the one before the catalytic converter) is reading .700, and the downstream ( the one behind the catalytic converter) is reading .700, or anywhere near that, then you have a problem. The numbers are just examples. The upstream should constantly swith from high to low voltage. If the downstream is identical, or even remotely close to having the same reading as the upstream, then you most likely have a defective catalytic converter. This does correspond to what happened a couple of weeks back. A misfire will take out a catalytic converter if not repaired quickly. Also, if you had a converter that was marginal, and was close to failure, then that misfire may have been just what it needed to fail.

Posted on Nov 10, 2008

  • 1 Answer

SOURCE: 96 jeep grand cherokee 4.0

change the computer .... PCM get a used one it fixed mine had same problem

Posted on Feb 19, 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

  • 136 Answers

SOURCE: Changing spark plug wires on 2001 Jeep Grand cherokee

yah direct ignition coil pack does away for the need a a distributer cap and rotor.much higher energy ignition system where the computer tell when to fire.if that helps.not hard to change.as long as you change them one at a time so you don't screw up the order.

Posted on Nov 28, 2009

dhorsefield
  • 270 Answers

SOURCE: 1998 Grand Cherokee Jeep...4.0..idles rough and

Check any rubber hose pieces between the PVC valve and the motor (intake). Normally a leaking hose will have a soft squishy area in the hose where the rubber is melting and the hose will create a vacuum leak at that point. You can tape over the squishy area with electrical tape (get it tight) and if it runs better you should replace the hose pieces. This leak will cause the motor to run very rough at idle, can cause the motor to race when starting it, can cause the vehicle to shift hard (when motor surges) and can throw scan codes indicating Lean Bank 1 AND Lean Bank 2 (presence of both codes is good indicator that vacuum leak is the cause).

Posted on Aug 06, 2010

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1995 Jeep Grand Cherokee Laredo 4.0, 276+ K, new crank sensor, new cam sensor, new throttle sensor, new plugs , new cap & Rotor, new wires, has electrical cut in / out of engine run, drop of tachometer...


Hello Lubie...

I would STRONGLY recommend you get your codes read...

I TRIED ALL that TOO...

Finally my codes... said the OXYGEN SENSORS were complaining... OBD... DTC
(on-board-diagnostic... DIAGNOSTIC TROUBLE CODES)

So... of course I changed the... OXYGEN SENSORS.

The "NEW" OXYGEN SENSORS complained just as well...

I have subsequently learned the "SENSORS" are
just doing their job...

In my case reporting on a collapsed catalytic converter.
(muffler is actually a MORE common blockage).

A little hunting around... like Auto-Zone ... Napa auto...
Pep-boys... O'Reilly Auto Parts... even MIDAS might
yield FREE READINGs... (check around).

Just remember to wear your best SALES RESISTANCE...

and look up you prices on ROCKAUTO...
before you go... Hope this helps.

ROCKAUTO
1998 JEEP CHEROKEE 4 0L L6 Catalytic Converter RockAuto

1995 JEEP CHEROKEE 4 0L L6 Catalytic Converter RockAuto

Carnac the Magnificent

May 28, 2017 | Jeep Grand Cherokee Cars & Trucks

1 Answer

1993 jeep grand cherokee put new sencor on, new fuel pump, new relay, coil pack and still is'nt getting any fire from coil. it just keeps cranking.


Crank position sensor mosly likey. Seems like you wasted a lot of money on unnessary parts. Crank sensor should cost about $40

Feb 24, 2010 | 1993 Jeep Grand Cherokee

3 Answers

No spark


change the pickup coil, it is the box connected to the distributer by a wire

Apr 04, 2009 | 1997 Jeep Grand Cherokee

1 Answer

'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.

Mar 12, 2009 | 1997 Jeep Grand Cherokee

1 Answer

94 jeep grand cherokee missing after it gets warm


YOU NEED TO HAVE IT SCANNED TO ISOLATE WHICH CYL. PROBALY AN INJECTOR OR CONNECTOR OR CRANK SENSOR LEAD RUBBING INTAKE

Jan 25, 2009 | 1994 Jeep Grand Cherokee

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