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Old 03-16-2014, 02:33 PM   #1
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2001 TJ Sport

Recently took a friend to buy his first jeep. He purchased a 2001 wrangler sport with an inline-6 and 100K miles... few days later it began to stall with no warning. The air filter was brand new and recently had oil changed. Took a look and had to replace the fuel pump and assembly as there was very low fuel pressure. Drove it for a while (days) with no issues and then it began stalling again with no warning... ran sea foam through two tanks of gas now and replaced the spark plugs. Everything ran fine... day or so later same thing.
Started looking at other reasons for the stalling... came up with the ACI sensor. ACI sensor was replaced yesterday and ran well... lower RPM at idle and no hesitation when letting off the gas pedal. Drove it to work today and on the way home it stalled again. Now we are thinking the Crankshaft Position sensor... just grasping at straws now!

Just to add a wrinkle to the whole story... there has not been a Check Engine Light on the entire time!

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Old 03-17-2014, 10:26 AM   #2
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Anyone??

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Old 03-17-2014, 11:21 AM   #3
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Idle air control, TPS? I would give the throttle body a good cleaning in general.
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Old 03-17-2014, 12:34 PM   #4
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I wish I had more knowledge to help you, I know things like this can be so frustrating. I'm sure someone here will have the answer though.
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Old 03-17-2014, 02:48 PM   #5
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Clean the IAC.... I swore that wouldn't be my problem until I finally cleaned it well - which ended up helping a lot.
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Old 03-17-2014, 03:00 PM   #6
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Yes, I'd focus on the IAC and the TPS to start with.
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Old 03-17-2014, 03:37 PM   #7
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It can be the ignition coil pack
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Old 03-17-2014, 04:09 PM   #8
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Had a similar problem with my 94 GMC pickup. Replaced the fuel pump as well as the fuel pump relay. Still no luck. Ended up being the starter switch. Not the starter, starter switch. Not to knowledgeable about it tho because I had a shop do it.
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Old 03-17-2014, 06:31 PM   #9
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My parents had this problem with a Cherokee they had years ago. It went on for months and the dealership was about to give them a new one even though they had owned it for 2 years. They did finally fix it and I'm pretty sure it was the cam sensor. It was about 15 years ago though so I honestly can't remember that well.
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Old 03-17-2014, 07:42 PM   #10
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No codes? My wife's old Cherokee would just die for no reason & it wound up being the CPS but it threw a code on the odometer readout after using the on/off sequence with the ignition key.
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Old 03-18-2014, 05:42 AM   #11
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We replaced the IAC on Saturday and the throttle body was cleaned at the time of installation.
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Old 03-18-2014, 08:56 AM   #12
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My money is on the CPS...same thing was happening with my '00. From what I read it is best to spend the cash to buy the OEM Mopar part.
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Old 03-18-2014, 08:58 AM   #13
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My money is on the CPS, same thing was happening to my '00.

From what I have read it is best to spend a little extra for the OEM Mopar part...

'00 Sport stalling at speed
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Old 03-27-2014, 06:46 PM   #14
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Thanks for all the suggestions! Turned out to be the CPS! Thanks again!
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Old 03-27-2014, 09:00 PM   #15
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Quote:
Originally Posted by BigDaddyAt View Post
My money is on the CPS, same thing was happening to my '00.

From what I have read it is best to spend a little extra for the OEM Mopar part...

'00 Sport stalling at speed
Bigdaddy is the big winner. Johnny what do we have for our esteemed winner?
Look down there, you've won a brand new Jeep JK...What's that....ah no we don't have any TJ's....You've won a brand new JK....what do you mean you don't want it
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Old 03-28-2014, 12:48 PM   #16
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Quote:
Originally Posted by patlisa View Post
Bigdaddy is the big winner. Johnny what do we have for our esteemed winner?
Look down there, you've won a brand new Jeep JK...What's that....ah no we don't have any TJ's....You've won a brand new JK....what do you mean you don't want it
Haha...nah, I'll keep my TJ, thanks. JKs are just more expensive to mod and repair :P

I only knew because I did a ton of reading when it happened to me...lol
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Old 03-28-2014, 02:24 PM   #17
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you might be on the right track with either the cam or crank position sensors... both of those crapped out on me within a week of eachother. Check the ignition rails too and look for cracks/ breaks

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