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Old 07-06-2011, 01:40 PM   #1
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Default 99 Grand Jeep Cherokee won't stay running

Looking for help in Staten Island, NY or New Jersey area. My 1999 Grand Jeep Cherokee won’t stay running.
I change PMC and Coil Pack
I had check the timing twice and its right on the money. I need some help with this, if anyone want some free pizzas and beer please let me know when you could come by and help.
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Old 07-06-2011, 06:37 PM   #2
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more info. Codes? fuel pressure? spark, does it run at all? Gas in it?
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Old 07-06-2011, 06:38 PM   #3
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Oh, motor size?
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Old 07-06-2011, 10:02 PM   #4
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it 4.0 and it has gas.
I did get spark.
no codes.
took out the injectors and had my wife turn the engine over and fuel came out the injectors.
And yes it was running before.
Also change the cam sensor

This was a rebuild motor and the engine compression check out fine. But every time i try to start it sound like its back firing. But then sometimes it will catch a run for a few seconds and then shut off. I 've been working on this Jeep on and off since November of last year and I really need to finish it before the summer is over.

The only thing I have not change is the crank sensor on the flywheel.
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Old 07-06-2011, 10:23 PM   #5
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Change the crank sensor
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Steering stabilizers will not cure or cause death wobble, they only mask the real problem that is causing death wobble. Oil pumps do not make pressure, they create flow. Bearing clearence and restrictions make pressure. It's the crank sensor.
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Old 07-12-2011, 07:53 AM   #6
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I had the same problem trying both cam and crank position sensors didnt work for me the n i just gota new computer for it and its been running great ever since
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Old 07-12-2011, 06:07 PM   #7
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I did get a new PCM and i'm still having the same problem. Me and a friend of mind got it run on Sunday but it has a bad miss. He had ask me if the flywheel is install correctly, I just wanted know from you guys does the flywheel has to in a particular position that the flywheel has to be install.
Pictures would help.
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Old 07-12-2011, 07:11 PM   #8
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If I'm not mistaken the fly wheel should only go on one way. The key way will alien the fly wheel in the correct spot.
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Old 07-13-2011, 03:43 PM   #9
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I met to say flex plate...My jeep is an automatic.
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Old 07-13-2011, 07:04 PM   #10
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Change the crank sensor.
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Steering stabilizers will not cure or cause death wobble, they only mask the real problem that is causing death wobble. Oil pumps do not make pressure, they create flow. Bearing clearence and restrictions make pressure. It's the crank sensor.
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Old 07-16-2011, 04:18 PM   #11
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I just install the crank sensor on my 99 WJ and I"m still having the same problem. The jeep started right up ran for 35 sec with this loud vacuum noise coming from the throttle body and then it cut off. At this I have 2 options 1. Could get my hands on another 4.0l replace the engine 2. Could get my hands on a V8 4.7 (Engine, Transmission, wiring harness pretty much everything I ould need for the engine swap.

Please tell me which is the best route, I need to get my WJ running before the summer is over.
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Old 07-16-2011, 06:19 PM   #12
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Check your timing if you have fuel spark and air it should run but if you don't have spark at the right time it won't.I hope this helps.
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Old 07-16-2011, 10:43 PM   #13
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Check the fuel pressure. The sucking sound you heard was the IAC motor trying to compensate for fuel starvation.
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Steering stabilizers will not cure or cause death wobble, they only mask the real problem that is causing death wobble. Oil pumps do not make pressure, they create flow. Bearing clearence and restrictions make pressure. It's the crank sensor.
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Old 07-17-2011, 07:37 AM   #14
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What kind fuel problem you think it might be? The injectors are working.
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Old 07-17-2011, 03:06 PM   #15
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Pump not working correctly.
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Steering stabilizers will not cure or cause death wobble, they only mask the real problem that is causing death wobble. Oil pumps do not make pressure, they create flow. Bearing clearence and restrictions make pressure. It's the crank sensor.
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Old 07-17-2011, 03:06 PM
 
 
 
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