Auto Repair forum

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96 Jeep Grand Cherokee Limited

by rickpulak / October 31, 2010 10:51 PM PDT

My husbands JGC wont start...weird because it started yesterday. Its a 4.0 with like 130K on it. It sat all winter but started it once a month or so no prob.

Its not getting spark, he changed the coil, checked all fuses. I have been searching the forums and trying to give hime idea of things to check, with no luck. I just tried the antitheft thing by unlocking and locking the passenger/rear hatch and still wont start. it cranks and interiors come on but wont catch. Another wierd thing is the gas light is on even though there is like half a tank there. We got codes from it: 12-42-44-24-22-23-55.
Any ideas would be great. I have a whole list of things for him to check when he gets home inluding:connections on the ECU, fuel delivery to the fuel rail. I would like to him to test check the Auto Shut Down Relay, and the crank position sensor but dont know how. Please get back to me...we need this Jeep running asap.

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jeep GC
by badcherokee / November 2, 2010 11:06 AM PDT

first check your ground wire I have been there.... Is it 'caroooded' check from engine to batery from body left side to batery....

The crank sensor it tells it when to fire there is no good way to test its only $48 at napa and napa or dealership only stay away from advance or auto zone
cheap parts... to change it first un-hook batery the sensor is at 11:00 on the trans facing from front of engine you only need 11mm socket 3/8 drive with 3" ext- remove bolt pull out crank sensor when you replace it make sure the sticker is on the end this is the propper gap do not press down to hard replace bolt conecct pigtail its very easy to do plus
you know its replaced. keep the box and recipt napa has 1 year replacement.

The shut down relay is the same as the a/c clutch relay switch them

hope this helps check out my church at elevationchurch.org
mark, email me howardfauxwood@aol.com

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still not spark
by rickpulak / November 6, 2010 6:45 AM PDT
In reply to: jeep GC

We changed both the camshaft and the crankshaft sensors and still nothing. Ground wire is ok. Switched the relays and still cant get a spark.

We are totally lost and still think it has something to do with the fuel light that is on even though it has 1/2 tank. The check gage light is on as well. Pulled the codes and we are still getting: 123 TPS Sensor High and 118 Engine Coolant Temp High.


Can somebody give us a clue as to what to try next?

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