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Old 05-29-2013, 02:56 PM   #1
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2000 jeep surging and jerking on up hill grades

A few weeks ago my jeep would not turn over, it was dark, wet and snowing so I figured I'd hitchhike to work and try later. Later it would start then immediately stall out. Check light came on with P1391 (cam position sensor) and immediately light went off that same day. Two days later it started fine and I could hear the pcm correct the rough idle, so i figured I was out of the woods. Just a rough start and random miscode on a freezing wet morning, it happens...right! So I've been driving it now for almost a month and it always starts, drives great on downhills and flats but staggers and kind of jerks on up hills.I started simple and checked spark plugs, coils, air filter etc. all are awesome. Fuel filter is in tank and life time part on a 2000 so checked that off too. While looking into things I found that my water pump was weeping majorly. So we put in a new water pump in the rain...fun.
The hill staggering was not happening much until yesterday. Driving back up the pass from Reno is steep and my jeep was staggering most of the way. So now I'm finally excepting that I really have a sensor issue. Which is less than exciting as the cam sensor and the crank sensor look like hell to fix myself. I love working on my jeep but I think that I may have to draw the line at replacing the cam sensor, it seems over my head for my year (2000). What do ya'll think? Any thoughts or suggestions? Maybe I could get lucky and it might be the oxygen sensor!

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Old 05-29-2013, 03:07 PM   #2
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Cam and crank sensor are some of the easiest things on the entire engine to replace. If you're doing things like a water pump and plugs, you really should replace at least the cam position sensor.... for which you already got an error code.

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Old 05-29-2013, 09:35 PM   #3
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Right...i think that I was freaking myself out and misunderstanding what the Haynes manual said. I thought I had to remove the oil pump housing which involved Top Dead Centering and so on...and that seemed intimidating to me. But after I read your post I felt stupid so, back to the book! My friend (the same one who helped me with my fuel pump) actually found what I was misreading. She clearly pointed out to me that if you want to remove the cam position sensor ONLY, then it just involves unscrewing 2 little bolts on top of the CMS which is conveniently located right above the oil filter for beyond easy access. So it took about 2 minutes to replace...i feel so dumb but SO glad to know its that simple. Thanks!!! I got a crankshaft position sensor too, but I'm going to test the old one first in the morning, it looks just a little tougher to get to.
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Old 06-11-2013, 01:59 PM   #4
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Yeah, it's super simple. Good thing - since they commonly fail.

So how did that work out for you? Are you running ok now?
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