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Unread 10-06-2013, 08:57 AM   #1
reedy922
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Join Date: Oct 2013
Location: Verona, PA
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Electrical & Idling Problems

I have a 2001 Jeep Grand Cherokee Laredo with a 4.0L and am experiencing some issues. While driving, all my gauges stopped reading and every light on the dash came on. On top of it, now the Jeep will start and then idle for 2-5 seconds then stall. The instrument cluster was swapped with a working used one and i still have the same issues so I'm guessing that's not the issue. I'm at a loss as to whether i should be searching for a loose ground/shorted connector or look at replacing the computer.

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Unread 10-06-2013, 03:12 PM   #2
yogi22
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If the gauges all stop working you could be looking at either the crank position sensor and in rare cases the O2 sensor shorting to ground can sometimes prevent the clocks working and create running/idling problems

Hope this helps
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Unread 10-06-2013, 07:28 PM   #3
JPNinPA
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Connector on the inst cluster may be loose. Clean TB and IAC. Make sure the connections to the IAC and TPS are good. A bad iac, TPS or crank position sensor will cause the engine to fail.

Any CEL or codes?
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Unread 10-13-2013, 07:07 AM   #4
reedy922
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If it was the crank position sensor, wouldn't that prevent the jeep from starting all together as opposed to starting then stalling.?
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Unread 10-13-2013, 07:09 AM   #5
reedy922
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connector on the instrument cluster is tight and contacts are clean. throttle body and iac were cleaned a few months ago, so i suspect that there is no real issue there.
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Unread 10-13-2013, 01:42 PM   #6
JPNinPA
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Quote:
Originally Posted by reedy922 View Post
If it was the crank position sensor, wouldn't that prevent the jeep from starting all together as opposed to starting then stalling.?
As they go out you may be running and stall out mid trip with no indication. They do not always fail completely all at once.
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Unread 10-13-2013, 01:48 PM   #7
MoparMech
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Usually when the gauge cluster acts up it is a result of a bus failure. THis can be caused by a shorted to ground o2, crank,cam, iac, TPS sensors. If you take a scan tool and try to read codes and the scan tool cannot talk to the PCM than it is a communication bus problem.
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