2001 jeep cherokee crankshaft position sensor symptoms

Help, I'm about to sell this thing and buy something foreign.

When mine died, it went from operating perfectly, to dead on the side of the road in maybe 3/4 mile. It stumbled & stalled maybe 3 times, then would crank fine but not fire. (sorta feels like it ran out of fuel)

HTH and don't throw the old sensor out right away. If a new one doesn't fix your no-start, then ya got a spare

On my older Jeep it's a pair of 11mm bolts and the sensor is on the bellhousing at approx the 11:00 position.

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Basically what Woody said. I replaced my CPS six months ago. Initially my engine would drop the rpm or stall altogether on the highway and restart after a few seconds. At the time I thought it might be the fuel pump but that checked out OK. There were no codes from the PCM either so no pointers to the actual problem at the time. Then it began to stall more frequently and take longer to crank. Eventually it got so bad that the engine wouldn't stay running for more than a mile so I got it replaced. I've had no problems since then and the Jeep is back to its old reliable self (knock on wood).
Just replace the sensor and you'll be happy again. Maybe you'll change your mind about selling the Jeep. I'd never sell mine.

crank shaft positon sensor

my xj would idle and run great up to 15 miles per hour then start to stumble and shake and then die. new sensor fixed problem.

The next time the Jeep starts acting up, trace the CPS to the connection. Since the connectors are self cleaning unplug and replug the connection a few times. Then try starting the Jeep. More then likely it will start up. If this happens its time to replace the CPS.

Re: Whats the signs of a bad CPS????

How much do these run? Dealer or Autozone part??

Re: Whats the signs of a bad CPS????

about 42 bucks if i recall from adv auto, in stock.

Re: Whats the signs of a bad CPS????

question re this. my CPS is going bad and the previous owner just cut out the plug and spliced the wires, can I splice in a new plug or can I just resplice the wires???

Re: Whats the signs of a bad CPS????

Does anyone know about the paper between the CPS and the flywheel. I have never saw this on my 93' but I sure do eat thru CPS's. I'm only asking because the FSM calls for it. If it should have paper could you use a piece of masking tape?

Also every CPS that I had that has gone bad, Autozone (Wells Brand) and the original OEM one, they have been magnetized. Magnetized enough to stick to the firewall.

As far as symptoms, doesn't start, idles rough then dies. Sometimes I get the code "11" sometimes I don't. This weekend I got a code "54" camshaft position sensor, in the distibutor. I swapped out the distributor, it started but still had a rough idle. I swapped in an old CPS, so far so good. All computer codes are clear now.

Re: Whats the signs of a bad CPS????

first, second, third, fourth, fifth time CPS goes bad and on just unplug the connection (right behind the Valve cover) and then plug back in. When that stops working then replace it. I've been doing that for 20,000 miles now (about 10 times) and it won't die.

Buying something foreign is a good idea. That way when something goes wrong you KNOW you can't fix it. Alleviates all guilt of being dumb/lazy. That said (laziness) if a search had been done there would have been a wealth of information that popped up. In the OEM forum.

Re: Whats the signs of a bad CPS????

Paper? What paper?

If you are 91+, go to Quadratec and order a few. If you're 90 or older, it's OEMR only. I have three XJ's - 87, 88, 89, and no-one makes aftermarket CPS for them (damn.)

The plug is, IIRC, a regular Delco 3-pole Weatherpack with only two towers used, so why cut/splice? If it's something silly, replace it with the Weatherpack (available from a local with the Motormite "Conduct-Tite" line) and save the headaches for next time.) Typical service life of the OEM unit is about 150Kmiles, but I did just replace an original on my 88 at 220K!

Make sure the connexions are clean - I go so far as to blast mine clean with solvent and apply a bit of Ox-Gard anytime I have to take it apart. Works wonders...

The CPS is pretty much an "all or nothing" deal. Since it generates the timing signals for fuel and spark, you can pretty much assume that a "crank-no start" fault will be the CPS. Check and replace as required. They can be tested with a meter - perhaps someone here can get to their FSM easier than I can?

5-90

Re: Whats the signs of a bad CPS????

Quote:

Originally Posted by Markm80521

first, second, third, fourth, fifth time CPS goes bad and on just unplug the connection (right behind the Valve cover) and then plug back in. When that stops working then replace it. I've been doing that for 20,000 miles now (about 10 times) and it won't die.

Do carry a spare and be ready to replace it on the side of the road though if it does decide to die completely

Re: Whats the signs of a bad CPS????

Quote:

Originally Posted by Kejtar

Do carry a spare and be ready to replace it on the side of the road though if it does decide to die completely

Remi,

Wouldn't it be better just to replace it at home where it is safe instead of the side of a busy highway someplace!

hinkley

Re: Whats the signs of a bad CPS????

ok.... if you didn't get the slight hint I was trying to relay I will come out and spell it out: if your CPS seems to be needed to be disconnected and reconnected as it's getting stuck or hung and cleaning the connection doesn't solve it, replace it with a new one and keep the old one as a spare. Based on the location I don't know who would want to replace it on a hot engine anyways.....

Re: Whats the signs of a bad CPS????

Quote:

If you are 91+, go to Quadratec and order a few. If you're 90 or older, it's OEMR only. I have three XJ's - 87, 88, 89, and no-one makes aftermarket CPS for them (damn.)

CPS for 89 cherokee , the '91 and up uses Wells SU 369 ($49.99)and carries the same warranty.

5-90, I thought the same thing cause I couldn't find it on the web site, but when I did a search instead of paging through their lists, it came right up.