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[ninjahamster]

The first new CPS fitted by local garage worked for a week then "failed". Ran intermittently when wire wiggled so thought it must be wiring fault. Replaced connector but still the same. Found that when short loom from CPS was pulled gently the engine would run fine, when eased it began to misfire and when released would stop. Cable tied it with some tension and managed to drive from work back to local garage without any problems. Demonstrated problem to mechanics. My thoughts were that the CPS was either loose/misaligned or that there was a wiring fault in the new CPS, both of which were rectified by pulling the wire. Garage reported there was no problem with physical location of sensor and it has been replaced with a second new unit. Now can't get the engine to run without misfiring at all. Took a running car in with known fault and now have a non running car with a fault they can't understand. Is there something they are missing when installing the sensor regarding alignment? They say all you can do is slide it in the aperture and fit the bolt. The actual sensor has an elongated fixing hole implying some sort of alignment is required. Both the new sensors are Crown brand from a Jeep specialist. Anyone any ideas? Have been without car for 2 weeks and getting p*****d off with garage.  Thanks Andy.

[Jonny Jeep]

First off a lot of people have problems with aftermarket sensors and will not use anything other than OEM. That said your replacement sensors should be fitted with a paper spacer on the end of them, this is to ensure the sensor is mounted the correct distance for it to operate properly. If this isn't there the sensor could get damaged as soon as the engine is started. If your new sensors didn't have a paper spacer on them (I don't think aftermarket ones do but not sure) the fitters may have just tried to guess where the sensor should be and have it incorrectly set. The paper spacer part number is 5252229 from Jeep. The sensor should be mounted with paper resting on the fly wheel/drive plate and the bolt tightened to 7 Nm (60 in-lb).

[JamesH]

There are often problem with non genuine sensors, I went mopar and was fine.

[tag]

The one i fitted just had the holes for the bolts,  no adjustment    just had to be careful pushing it into the rubber cover, the wiring on mine ran to close to the exhaust manifold and had some damage.   good luck