sorry if this is long.... 99, jeep cherekee sport 4.0....i would drive for about 15 min and engine would stall. let it sit for a few mins and would start back up.. but it would do it at various days and times. had friend put on computer and said crank sensor was going bad. bought a new one and replaced it and truck runs worst. put old one back in and runs fine???????????

i just want to find the problem of it stalling cause i dont know when its gonna happen and its been making me late to work

 

Where did you buy your new crank sensor from?

It is not that unusual to see issues with many aftermarket crank sensors right out of the box. And to confuse matters more, sometimes those new sensors test good "electrically", but the spacing is just ever so slightly different which is a big thing with a hall effect sensor.

If your new sensor is an aftermarket, I'd recommend taking it back and getting a refund and buying one directly from Jeep. There IS a difference in these sensors. I answer at least two threads a week on issues like this.

With the way it runs with your original one back in there, your symptoms sure point to a faulty new crank sensor.

 

i bought it from an auto parts store and toke it back and got another hoping it was a bad one and it does the same thing. cant get money back cause it has been installed . thinking about going to the junk yard we have here that i go and get my own parts off and snag one off there and see how that one works

 

Only downside to that strategy is that you don't know if you're getting a factory sensor or another aftermarket sensor from a salvage yard.

 

Or if the jy one is even good

 

junkyards are awesome...

 

Man, considering the COLOSSAL PITA those things are to change, and the fact that a bad one will leave you high and dry without a moments notice with no work around, I'd shell out the $115 to get one from a dealer.

Seriously, it's just not worth short-cutting this one.

 

I was having this problem when i bought mine. Its the reason i joined.
I replaced the IAC the TPS then finally the CPS and now its fixed.

Everyone says they are a PITA, but it took me about 10 minutes.
I used a 12" (i think) extension and a 11mm socket (i think) on an air ratchet and got the bolts off without any trouble at all.


All in all it was incredibly easy for me and I'm no mechanic.

 

The replacing only got easier on me when I bought another 12" of extension. I think I had a total of 24" if not close to it. Gets easy when your ratchet is lower than your transmission, and can turn easily.

 

Use a 24 in extension with a wobble and an 11mm socket. Its pretty easy but looks like a pain at first

 

And let's the engine cool before changing it and make sure to zip tie it back away from the exhaust

 

I had no problem getting to mine and turning the screws. The problem that I had on mine is both of the of the srews snapped off. Now that is a PITA!