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-   -   Jeep dies and starts back up (http://www.wranglerforum.com/f282/jeep-dies-and-starts-back-up-233069.html)

Big Sarge 04-05-2013 04:28 PM

Jeep dies and starts back up
 
While driving on the interstate going up a hill my 98 4cyl just shut off. Pushed in the clutch turned off the ignition, turned it back on and let the clutch back out and it started back up and running fine. Gauges are all good and no CEL. It has done this twice in the last 100 miles or so. Any ideas?

Big Sarge 04-05-2013 05:53 PM

Scratch the gauges good part. It has done it two more times and the fuel gauge Went from three quarters tank to one half the first time. Second time it went from three quarters of a tank to over full. Fuel pump/sending unit maybe?

Big Sarge 04-06-2013 08:28 AM

Any ideas??

dutch169 04-06-2013 08:32 AM

My Regal use to do the same thing. As I was driving it would just shut off. I had to shift into neutral and start it back up. No mechanic ever found out why.

mrpotatohead 04-06-2013 08:34 AM

Start with the easiest first. Check the connections on the battery cables.

Big Sarge 04-06-2013 08:40 AM

Quote:

Originally Posted by mrpotatohead (Post 3601549)
Start with the easiest first. Check the connections on the battery cables.

Yeah they are all good. Just replaced the battery a couple months ago and put on brand new cables.

mrpotatohead 04-06-2013 09:09 AM

I would just go through and start wiggling ignition components. Check for corrosion/chafing. Then look at the fuel pump

Southerner 04-06-2013 09:14 AM

Mine did something similar, I had water in my tank. When you start it do you have to give it some gas?

Big Sarge 04-06-2013 11:25 AM

Quote:

Originally Posted by Southerner (Post 3601636)
Mine did something similar, I had water in my tank. When you start it do you have to give it some gas?

No it cranks right up no problems.

WaterDR 04-06-2013 02:45 PM

Loose ground strap?

6InARowMakesItGo 04-06-2013 03:04 PM

i used to have a car. after doing a lot of modifications it was fast. so fast when i hit the loud pedal it would stall if i didn't have at least half tank because the fuel would push back in the tank and the pump was near the middle. i'm not suggesting your jeep was accelerating this fast. i'm saying maybe because you were going up hill when it happens and maybe the pumps also going out.

Big Sarge 04-12-2013 04:33 PM

So after reading some other threads, I'm thinking its my CPS. $89.99 sound reasonable?

tangofox007 04-12-2013 08:49 PM

Quote:

Originally Posted by Big Sarge (Post 3628897)
So after reading some other threads, I'm thinking its my CPS. $89.99 sound reasonable?

Half that is reasonable. If you mean the price for the part only.

Big Sarge 04-13-2013 06:49 AM

Yes the part only. I will install myself. Anybody think its not the VPS at all

MosesTJ 04-13-2013 07:23 AM

1 Attachment(s)
Could be fuel filter. Does it act up when you have a full tank of gas?

You can try a fuel pressure test before changing any parts.

Big Sarge 04-13-2013 07:39 AM

Yeah it does with a full tank as well but only after its been running for a while and I fill it back up.

Matt98tj 04-13-2013 08:09 AM

Mine did the same thing. It was the fuel pump!!!

Jerry Bransford 04-13-2013 02:26 PM

It's definitely not being caused by a clogged fuel filter which just doesn't happen on TJs due to its lifetime fuel filter which has a positively enormous filtration area. A bad fuel pump would normally cause it to sputter & be hard to start so that wouldn't be my guess either. My best guess is your Crankshaft Position Sensor is going bad. The CPS generates the engine's master timing signal & when it goes bad, the engine can shut off intermittently.

Big Sarge 04-14-2013 04:53 PM

Changed the CPS today and 130 miles into my drive home it starts shutting off again?!?!?

MosesTJ 04-14-2013 06:16 PM

I had a vehicle do this same thing. It would start up good and drive for awhile, it started with small stalling at lights and led up to engine shutting off as I would go up a hill. I could only assume afterwards that it was sending the fuel but not getting the spark from the distributor so it was flooding the engine. I have seen where if the CPS was bad you would get have trouble starting as well as the intermittented power losses. I know all cases are different.

Big Sarge 04-14-2013 06:27 PM

after having the issue for a couple of weeks here is a list of a few things I have noticed.

1. The issue seems to be more persistent when the ambient temperatures are higher.

2. The issue only arises after having driven the Jeep for longer periods of time straight with no breaks. It is my DD 10 miles to work and back, have never had an issue there. I drive home on the weekends (about 3.5 hours one way), and it starts after having been on the road for about 1-1.5 hours.

3. The issue is almost isolated to only going up hills. Has happened once while going down but only after having climbed a big hill.


With all that being said, I am back to thinking fuel pump issue! I am thinking that it is getting hot and losing connection or something. I am a mechanic but this is my first Jeep and have never worked on them other than this one. Anybody have any other suggestions?? Also what fuel pump should I go with, if I end up going that route? I have read on here to avoid Airtex, so that much I know already. Any and all help or criticism is welcomed and appreciated.

Mo Kirkwood 04-14-2013 06:32 PM

I have a friend with an "08" JK and she will be driving and the engine will shut down. It's and automatic and the shop can't find the problem either. It runs good until it dies. I would like to know more about your finds if you get it fixed so I can hopefully help her out. Thanks.

Big Sarge 04-14-2013 07:32 PM

If and when I get it fixed I will post in here

Jmaddox22472 04-14-2013 07:52 PM

Did you try the TPS throttle position sensor?

Big Sarge 04-14-2013 08:01 PM

Quote:

Originally Posted by Jmaddox22472 (Post 3637019)
Did you try the TPS throttle position sensor?

No I have not. Can you elaborate on why you think this may be a possibility?

Boomingcosmo 04-14-2013 08:26 PM

Well I was having the same problem.....and what I did was when it got on E I stopped at autozone and picked up Ethanol its in a white can and has pics around top of can of boats jeeps atvs and a few other. The guy says I should do it 3x more everytime I fill up. Its 11.99 a bottle. It wrked.!!!!! So you should try that.

Big Sarge 04-14-2013 08:42 PM

Quote:

Originally Posted by Boomingcosmo (Post 3637150)
Well I was having the same problem.....and what I did was when it got on E I stopped at autozone and picked up Ethanol its in a white can and has pics around top of can of boats jeeps atvs and a few other. The guy says I should do it 3x more everytime I fill up. Its 11.99 a bottle. It wrked.!!!!! So you should try that.

So yours did the exact same thing? Only on long trips? Just trying to be sure. I've already thrown $90 at it with the CPS. It runs perfect other than on these long trips.

Boomingcosmo 04-14-2013 08:58 PM

Does it get warm by ur feet? If so Cadillac converter needs to be flushed

Big Sarge 04-14-2013 09:05 PM

Quote:

Originally Posted by Boomingcosmo (Post 3637299)
Does it get warm by ur feet? If so Cadillac converter needs to be flushed

Nothing that I would consider out of the ordinary. Again I've only owned this Jeep since November. It does not get hot to the point of discomfort or even to make me think there should have been more insulation from the factory.

Boomingcosmo 04-14-2013 09:18 PM

Well I wish u luck then.....sorry couldn't help. They fo say that you can't get to 1/4 tank or it will act as if it is emnty....just a fyi


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