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Crankshaft Position Sensor Reset

164K views 43 replies 17 participants last post by  Hacker777 
#1 ·
Replaced CPS, now it idles rough, rpm's bounce around. Original problem, engines shuts down while driving.
Need to reset and have no instructions on How To Reset. Any help would be greatly appreciated.

Thanks in advance,
 
#41 ·
Thanks. I have a new ckp arriving tomorrow but coudn't get a spacer. I do have a caliper and found on another forum:

"It measures 14mm(.551) in diameter and most importantly .034 thick. I measured the thickness of a 12pk cardboard and cereal box cardboard and they only measure about .02 thick so you should find something almost twice as thick to cut one out of."

so I'm going to take the caliper tomorrow and find something that fits the thickness.
 
#42 ·
The paper spacer is not applicable to all versions of the CPS. The versions that do use a spacer have an elongated bolt hole that allows for depth adjustment. If your CPS has a round hole with the bolt running longitudinal with the sensor, you don't need a spacer, as no depth adjustment is possible.

I believe that last Wrangler model to use the paper spacer was the 2001 with auto transmission.

More Information for STANDARD MOTOR PRODUCTS PC176

I have a new ckp arriving tomorrow but coudn't get a spacer.
I suspect that there is a good reason for that.
 
#43 ·
So as expected after reading that last post, the new sensor with spacer did nothing.

I unplugged the tps, and the jeep starts and idles fine. The only code is for the tps circuit. I took it around the block and it is working perfect. With the tps plugged in, the same cps code comes back and jeep does not idle correctly:

Am I safe to say it's the tps?
 
#44 ·
Solved!! I know this is an old thread but may be helpful.

First time posting on this forum.

Had the same problems (CPS and CPK Codes) rough idle or no start. Read posts, here and other forums. Was going to re-replace (distributor style) Cam Position sensor but decided to grab hold of the tone spinney thingy that the sensor senses. (Don’t do this while it’s spinning). I thought to myself “Hmmm that’s odd…. this spinney thing rotates freely. This is supposed to be, directly, geared to the oil pump / crankshaft” I then decided to pull it out….”Clink clank clunk” The small gear that was on the Cam position sensor shaft dropped into the oil pan.

The spring pin that holds the gear to the Cam position sensor shaft had sheared off. Once I got the gear out of the oil pan and replaced the whole assembly the engine worked fine.

The intermittent nature, I think, is due to friction between the shaft and the gear. This allows the shaft to spin and the sensor to still pick up a signal (but not a very good signal)

Hope this helps.
 
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