Please Help....
03-30-2012, 04:00 PM
#16
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Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
Well folks....this morning I woke up and drove my XJ to the closest mechanic (about a half mile) and had him check for codes. Believe it or not, no codes were set for the light last night. I couldn't believe it. So guy tells me he doesn't know what to tell me. Suggests ignition coil (same excuse he gives everyone no matter what vehicle or so i hear). Anyhow I drive back home and a little later go to take it to another mechanic and I crank it and it cuts off in like 10 seconds. Then won't crank again. Just lags...urrr urrr urr. Then it cranks next try. So I am driving to the shop and it stutters (tach drops and throws light on for moment tach is at zero) and continues on. So i get almost there and it just shuts off at the stop light. Wouldn't crank just urr urr urr again. Then we push it out of the road but it cranks again...and me not knowing for how long I had to have it towed.
Just don't want to the dealership to give me crap...it can't be in the battery or cables cuz my lights stay on the motor just dies. If it were the crank sensor I think I may get a code stored. I would think the computer would cause more problems than just that.
Never thought of this before but maybe its the cam sensor (in distributor in that model)
Any thoughts???
Just don't want to the dealership to give me crap...it can't be in the battery or cables cuz my lights stay on the motor just dies. If it were the crank sensor I think I may get a code stored. I would think the computer would cause more problems than just that.
Never thought of this before but maybe its the cam sensor (in distributor in that model)
Any thoughts???
By the sounds of it, I am more and more thinking CPS. Of all the threads I have read with CPS issues, this is fitting the bill. I hope you get some help bud. Hopefully more insight can come in here and help you out. Keep us posted.
04-01-2012, 01:02 AM
#17
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Year: 1999
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Okay so i here is the latest.....
Get a call from the shop today and the only thing they can find wrong.with my jeep from a whole check (aside from new wiper blades) is that my alternator is fluctuating in voltage and not properly charging. It will cost 350 dollars. Does anyone think this could actually be the problem ????
Like i.said before the lights never go off when the problem occurs and i never noticed a change in the voltage on the dash. But then again i never payed it too much attention. I only noticed the.tach drop.
Also, can faulty voltage output from the alternator cause check engine light to come on like i described?
Get a call from the shop today and the only thing they can find wrong.with my jeep from a whole check (aside from new wiper blades) is that my alternator is fluctuating in voltage and not properly charging. It will cost 350 dollars. Does anyone think this could actually be the problem ????
Like i.said before the lights never go off when the problem occurs and i never noticed a change in the voltage on the dash. But then again i never payed it too much attention. I only noticed the.tach drop.
Also, can faulty voltage output from the alternator cause check engine light to come on like i described?
Last edited by jeepxj99; 04-01-2012 at 01:04 AM.
04-01-2012, 01:06 AM
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Year: 1989
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Originally Posted by jeepxj99
Okay so i here is the latest.....
Get a call from the shop today and the only thing they can find wrong.with my jeep from a whole check (aside from new wiper blades) is that my alternator is fluctuating in voltage and not properly charging. It will cost 350 dollars. Does anyone think this could actually be the problem ????
Like i.said before the lights never go off when the problem occurs and i never noticed a change in the voltage on the dash. But then again i never payed it too much attention. I only noticed the.tach drop.
Get a call from the shop today and the only thing they can find wrong.with my jeep from a whole check (aside from new wiper blades) is that my alternator is fluctuating in voltage and not properly charging. It will cost 350 dollars. Does anyone think this could actually be the problem ????
Like i.said before the lights never go off when the problem occurs and i never noticed a change in the voltage on the dash. But then again i never payed it too much attention. I only noticed the.tach drop.
04-01-2012, 08:18 AM
#19
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Year: 1999
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350 for diagnostic and replacement with new alternator.
Alright....from all my research i have come up with one of two things if it is the alternator since the voltage regulator is in the pcm.
A. The voltage reg is messed up and the pcm would have to be replaced.
Or...
B. The faulty alternator makes the pcm go crazy cuz the regulator is trying to fix the voltage.
Sound right?
Alright....from all my research i have come up with one of two things if it is the alternator since the voltage regulator is in the pcm.
A. The voltage reg is messed up and the pcm would have to be replaced.
Or...
B. The faulty alternator makes the pcm go crazy cuz the regulator is trying to fix the voltage.
Sound right?
Last edited by jeepxj99; 04-01-2012 at 12:46 PM.
04-01-2012, 05:30 PM
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Year: 1991
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350 for diagnostic and replacement with new alternator.
Alright....from all my research i have come up with one of two things if it is the alternator since the voltage regulator is in the pcm.
A. The voltage reg is messed up and the pcm would have to be replaced.
Or...
B. The faulty alternator makes the pcm go crazy cuz the regulator is trying to fix the voltage.
Sound right?
Alright....from all my research i have come up with one of two things if it is the alternator since the voltage regulator is in the pcm.
A. The voltage reg is messed up and the pcm would have to be replaced.
Or...
B. The faulty alternator makes the pcm go crazy cuz the regulator is trying to fix the voltage.
Sound right?
04-01-2012, 07:31 PM
#21
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Yeah i gave them an exact description of what it was doing and all they did was stationary tests. They didnt even drive it anywhere. Thats why i am.still unsure they have pinpointed the cause of my actual problem. Because when they called they just said the only thing they could find was the changing voltage. They said it was a possible cause but more than likely.
And not to be an jerk to them or anything but if it breaks down again on the way home im not going to be happy.
And not to be an jerk to them or anything but if it breaks down again on the way home im not going to be happy.
04-01-2012, 07:33 PM
#22
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Yeah i gave them an exact description of what it was doing and all they did was stationary tests. They didnt even drive it anywhere. Thats why i am.still unsure they have pinpointed the cause of my actual problem. Because when they called they just said the only thing they could find was the changing voltage. They said it was a possible cause but more than likely.
What EXACTLY is the voltmeter doing? Does it stay at 14v, or drop to 12v, or bounce everywhere, read high, read low, everything normal?
04-01-2012, 07:39 PM
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Year: 1989
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Originally Posted by 1991Jeep_Man
Ask them if they tested or even considered the possibility of a CPS.
What EXACTLY is the voltmeter doing? Does it stay at 14v, or drop to 12v, or bounce everywhere, read high, read low, everything normal?
04-01-2012, 07:43 PM
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It's a conspiracy. Jeep programmed all CPS's they installed at a certain point to fail simultaneously, therefore causing a rise in CherokeeForum bandwidth usage that would cause an overload in a world server which would render the gubment's super secret alien/zombie defense system useless, in turn allowing the predicted events of 2012!!!
04-01-2012, 08:00 PM
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Originally Posted by 1991Jeep_Man
It's a conspiracy. Jeep programmed all CPS's they installed at a certain point to fail simultaneously, therefore causing a rise in CherokeeForum bandwidth usage that would cause an overload in a world server which would render the gubment's super secret alien/zombie defense system useless, in turn allowing the predicted events of 2012!!!
Last edited by stev-o; 04-01-2012 at 08:28 PM.
04-01-2012, 08:40 PM
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Originally Posted by stev-o
And to save the earth they will summence all xj drivers to beat the aliens
04-01-2012, 08:41 PM
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Originally Posted by 1991Jeep_Man
Ask them if they tested or even considered the possibility of a CPS.
What EXACTLY is the voltmeter doing? Does it stay at 14v, or drop to 12v, or bounce everywhere, read high, read low, everything normal?
04-01-2012, 09:11 PM
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Originally Posted by 1991Jeep_Man
Ask them if they tested or even considered the possibility of a CPS.
What EXACTLY is the voltmeter doing? Does it stay at 14v, or drop to 12v, or bounce everywhere, read high, read low, everything normal?
04-01-2012, 10:14 PM
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Crankshaft Position Sensor. Appariently sometimes they don't just flat out fail, but will randomly go out and come back, becoming more frequently out as the sensor gets worse and worse. If the volts stayed the same, the lights always stayed bright, and the accesories always worked fine, I think this shop is just being lazy and aiming for the first easy fix and payday. I'd seriously tell these people to pound sand if this is the case.
04-01-2012, 11:31 PM
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Originally Posted by 1991Jeep_Man
Crankshaft Position Sensor. Appariently sometimes they don't just flat out fail, but will randomly go out and come back, becoming more frequently out as the sensor gets worse and worse. If the volts stayed the same, the lights always stayed bright, and the accesories always worked fine, I think this shop is just being lazy and aiming for the first easy fix and payday. I'd seriously tell these people to pound sand if this is the case.