Changed the CPS yesterday and now my XJ is idling rough (almost like a cylinder missing). New battery, new alternator. Any idea why this is happening?

 

Possibly a bad CPS. What are your specs. and what issues were you having that caused you to change the CPS?
Also was the replacement an OEM part, or aftermarket?

 

Jeep would shut don't randomly while driving and mechanic said the code referenced not recognizing the crankshaft sensor. Aftermarket part.

 

I think just about everyone on here agrees (which is odd for most public forums), that when it comes to the CPS, it's the OEM part that you want.

I have read a few past threads where people have replaced the CPS with a cheaper one off amazon.com and had problems. Then ended up replacing again with an OEM and fixed the problem.

 

That's what I was afraid of. Thanks for the help.

 

Thanks for the help.

 

I did read that it might be necessary reset the computer after changing the sensor, is this true?

 

Yup, it's a good idea to reset the computer any time you change out a sensor.

 

I'm currently having the same proble. Car would not start no sparked followed it to the CPS changed it out and she started right up and ran fine the first fire, after and hour or so fire it up agai. And it running like crap. Doing and odd high idle rev and when you give it gas it all over the place , anyone got anything more 2 add?

 

did you use OEM or aftermarket CPS?

 

I got the borgwarner from O'Reilly was told it was OEM,but kinda starting 2 wonder....