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Old Aug 3, 2012 | 12:15 AM
  #13111  
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Originally Posted by odgreen89on35s

Oh nevermind the fuel filter.... Lol.
You got a check engine light on?
Ya I had that read and it came up as a faulty nss. I have also replace both O2s. It was also throwing a code for something that the autozone guy said was not in their system and he said he couldn't help me on that one. I forget what code it was but I have a pocket scanner that I can check with in a day or two
Old Aug 3, 2012 | 12:24 AM
  #13112  
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Originally Posted by jeepbby123

Ya I had that read and it came up as a faulty nss. I have also replace both O2s. It was also throwing a code for something that the autozone guy said was not in their system and he said he couldn't help me on that one. I forget what code it was but I have a pocket scanner that I can check with in a day or two
Check it and pm me it. I'll walk you through it.
Old Aug 3, 2012 | 12:25 AM
  #13113  
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Ok thank you ill let you know
Old Aug 3, 2012 | 01:16 AM
  #13114  
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Originally Posted by 94XjSport94
I found out what i wanted... Do you have a better pic of where it came off of the TB?
I don't have any other pics, but all good. I just finished up cutting the new gasket and it looks decent, so gonna go ahead with that route. Glad ya found what you needed.
Old Aug 3, 2012 | 01:36 AM
  #13115  
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Year: 1994
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Default Chirp

So I have had this chirp for a while;

Pep Boys diagnostics: Water Pump, replaced and chirp remains.

Pep Boys re-diagnosis: Fan Clutch, replaced and chirp remains.

Pep Boys re-diagnosis again: Harmonic Balancer and Power Steering Pump pulley misalignment, replaced Harmonic Balancer and Pressed on Power Steering Pump pulley until the belt was aligned with the Water Pump and chirp remains.

I am getting my money back tomorrow. I have replaced every single pulley within the last year, the Water Pump, Idler, Clutch, AC Delete and Harmonic Balancer with the last 2 months. The belt is also 2 months old (Gates), tightened to as close as I could get to a 1/4" deflection. Spraying water on the belt does not change the noise, there is nothing noticeably wrong with any pulley turning them by hand. I don't know where to go from here.

I now officially hate Pep Boys.
Old Aug 3, 2012 | 01:39 AM
  #13116  
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Originally Posted by avision
I now officially hate Pep Boys.
lol... what took you so long?!?!
Old Aug 3, 2012 | 01:39 AM
  #13117  
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Originally Posted by avision
So I have had this chirp for a while;

Pep Boys diagnostics: Water Pump, replaced and chirp remains.

Pep Boys re-diagnosis: Fan Clutch, replaced and chirp remains.

Pep Boys re-diagnosis again: Harmonic Balancer and Power Steering Pump pulley misalignment, replaced Harmonic Balancer and Pressed on Power Steering Pump pulley until the belt was aligned with the Water Pump and chirp remains.

I am getting my money back tomorrow. I have replaced every single pulley within the last year, the Water Pump, Idler, Clutch, AC Delete and Harmonic Balancer with the last 2 months. The belt is also 2 months old (Gates), tightened to as close as I could get to a 1/4" deflection. Spraying water on the belt does not change the noise, there is nothing noticeably wrong with any pulley turning them by hand. I don't know where to go from here.

I now officially hate Pep Boys.
Pep Boys re-diagnosis- give us more money
Old Aug 3, 2012 | 01:42 AM
  #13118  
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Originally Posted by jeepbby123
Pep Boys re-diagnosis- give us more money
They didn't charge me to look at it the second and third time.
Old Aug 3, 2012 | 01:47 AM
  #13119  
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Originally Posted by Basslicks
lol... what took you so long?!?!
=> Pep Boys

My Dad runs parts for them and said they haven't done him wrong, so I gave them a shot despite all of the trash piled up on more trash talk I have heard about them, pfft. Any idea what I should do?
Old Aug 3, 2012 | 06:10 AM
  #13120  
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From: Parham, ON
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Engine: 4.0L OBD-II
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Originally Posted by Squatting Pigeon
Quick question about my '94 2wd 4.0 cherokee
I'm having trouble starting and keeping it running.
somedays it will crank and crank forever and never catch, others it will fire right up...
but before you suggest the CPS, the truck will die driving down the road and then not start back up, or take forever to start back up...
So, my question is; could the CPS kill the truck? or only keep it from starting?
ive replaced one before on a previous jeep, but ive never run into this problem before..
any help is appreciated
Yes absolutely. The CPS is used by the ECU to determine if the engine is rotating. It relies on the signal pluse in order to liven the coil and fire the fuel injectors. Same thing happens during no start as when the engine just dies. If you replace the unit make sure to get an OEM dealership one as the aftermarket ones have a bad reputation of being very poor quality (many DOA)

Before you go messing with sensors though have you done a ground freshening?
Old Aug 3, 2012 | 07:00 AM
  #13121  
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Year: 2001
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Engine: 4.0 L Inline 6
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Originally Posted by Basslicks

Awesome thanks.

Battery is holding full charge, so no problem there. Haven't had the alt checked, but it actually charged up the battery pretty quickly (10 minute drive home and next day started up just like normal)... I don't know that I would say it is surging, more like dipping when I let off the accelerator... Particularly when the ac is on... But again, all of it started after the batt drained.

I suspected what the big h said, so I'm just gonna give it a couple of weeks and see if the ecm relearns and returns to normal.
For what its worth, this sounds similar to when my battery terminals get corroded. If you haven't cleaned them, it never hurts & just might make all the difference. I started using a cleaner and corrosion inhibitor from NAPA, and they seem to work pretty well. I'd try that - just my 2 cents.

My apologies if you've already done this & I just missed it in the thread.
Old Aug 3, 2012 | 01:40 PM
  #13122  
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From: Aberdeen, MD
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Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
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Originally Posted by Squatting Pigeon
Quick question about my '94 2wd 4.0 cherokee
I'm having trouble starting and keeping it running.
somedays it will crank and crank forever and never catch, others it will fire right up...
but before you suggest the CPS, the truck will die driving down the road and then not start back up, or take forever to start back up...
So, my question is; could the CPS kill the truck? or only keep it from starting?
ive replaced one before on a previous jeep, but ive never run into this problem before..
any help is appreciated
100% yes - when my CPS went bad the truck would die at stop lights, or diving down the highway at 70mph - didn't matter. Sometimes it would start right back up, other times it would take 5-10 minutes. Finally it got worse till it wouldn't start again at all.

Replace it asap before it leaves you stranded like it did me.
Old Aug 3, 2012 | 01:57 PM
  #13123  
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From: Phoenix, AZ
Year: 1994
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Originally Posted by avision
So I have had this chirp for a while;

Pep Boys diagnostics: Water Pump, replaced and chirp remains.

Pep Boys re-diagnosis: Fan Clutch, replaced and chirp remains.

Pep Boys re-diagnosis again: Harmonic Balancer and Power Steering Pump pulley misalignment, replaced Harmonic Balancer and Pressed on Power Steering Pump pulley until the belt was aligned with the Water Pump and chirp remains.

I am getting my money back tomorrow. I have replaced every single pulley within the last year, the Water Pump, Idler, Clutch, AC Delete and Harmonic Balancer with the last 2 months. The belt is also 2 months old (Gates), tightened to as close as I could get to a 1/4" deflection. Spraying water on the belt does not change the noise, there is nothing noticeably wrong with any pulley turning them by hand. I don't know where to go from here.

I now officially hate Pep Boys.
Any ideas? Anyone know a good mechanic in Phoenix or surrounding areas?

Just ran it without the belt and no noise.

Last edited by avision; Aug 3, 2012 at 02:03 PM.
Old Aug 3, 2012 | 04:35 PM
  #13124  
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Originally Posted by avision

Any ideas? Anyone know a good mechanic in Phoenix or surrounding areas?

Just ran it without the belt and no noise.
What happens when you spin each pully Individually. Any play wiggle. Do you have a spare belt to try
Old Aug 3, 2012 | 05:17 PM
  #13125  
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Originally Posted by salad
Yes absolutely. The CPS is used by the ECU to determine if the engine is rotating. It relies on the signal pluse in order to liven the coil and fire the fuel injectors. Same thing happens during no start as when the engine just dies. If you replace the unit make sure to get an OEM dealership one as the aftermarket ones have a bad reputation of being very poor quality (many DOA)

Before you go messing with sensors though have you done a ground freshening?
ground freshening such as.....
checking them? or cleaning/redoing them?

Originally Posted by dukie564
100% yes - when my CPS went bad the truck would die at stop lights, or diving down the highway at 70mph - didn't matter. Sometimes it would start right back up, other times it would take 5-10 minutes. Finally it got worse till it wouldn't start again at all.

Replace it asap before it leaves you stranded like it did me.
thanks I appreciate the info, its on my list of things to try. I cleaned the IACV today and it seems to be working fine so thats not the culprit



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