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  #1  
Old 05-15-2015, 09:02 PM
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Crankshaft positiion sensor

Replaced CPS after 88' Cherokee 4.0 6 Cylinder would make it all the way to town (about 12 miles), smooth engine all the way then on the way back engine would quit, after about 1/2 hour it started right back up and made it home.
Now with new CPS installed engine runs very rough and sounds like a vacuum problem , while taking new sensor out and putting old one back in, I noticed a small "L shaped vacuum stem w/o hose attached" right above CPS, can anyone tell me if there is suppose to be a hose there and where it goes? Or even the name of it, so I can search for more answers

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Old 01-15-2016, 07:59 PM
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Re: Crankshaft positiion sensor

I would check the vacuum line running along the undercarriage that works the fuel delivery compression chamber generally located on the driver's side behind the rear axle. There is a metal section that rusts out causing a hard to trace, but damn cheap to fix vacuum leak that causes said symptoms after the engine gets to temp... Good luck !!!
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Old 01-15-2016, 09:44 PM
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Re: Crankshaft positiion sensor

Hi J Wolf
We found a little skinny vacuum hose (it came from the MAP sensor to the throttle body) that was unattached
I still don't know what the name of that little valve is though ("L shaped vacuum stem without a hose attached" right above CPS)

Thanks for taking the time to answer
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Old 01-18-2016, 11:21 PM
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Re: Crankshaft positiion sensor

Did it solve the problem?
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Old 01-19-2016, 12:47 AM
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Re: Crankshaft positiion sensor

no, I don't know what the name of it is still

we replaced the CPS, it quit dying on us
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Old 01-19-2016, 05:00 AM
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Re: Crankshaft positiion sensor

Good deal...
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