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2004 Chevrolet Colorado 1SB LS Z85 Crew Cab 126.0 WB

2004 Chevrolet Colorado
Trim Info:
Rear Wheel Drive, Crew Cab
20 mpg city / 27 mpg hwy
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August 6, 2012, 5:38 pm

Jason H
 

Question: Cam/Crankshaft position sensor

Having intermittent rough idle and hesitation on acceleration on '05 Chevy Colorado. Had it in the shop and they cleaned the throttle body, which.. Made things better, but, problem still occurs.

Pulled the Cam/Crankshaft position sensor.. Looks like this.

http://tinyurl.com/92nydo9

Hard to see in a picture, however.. The middle screen is.. Fairly dirty with very fine particulate matter. I used carb cleaner to clean the debris and reinstalled. Can't say it's SOLVED, but, didn't happen during my test drive.

Would you think from that image that may be the problem? Does that look bad, Bad or BAD? I know it's not good, just a matter of how bad it is.


August 9, 2012, 7:22 pm

Elizabeth K
Expert Mechanic

That type of sensor works by picking up a magnetic signal, so unless that screen is plugged with iron filings, it's not likely that cleaning it will affect it. You could check the signal output of it to see if it's working, some good info on that here:
http://troubleshootmyvehicle.com/gm_ckp_4.3L_5.0L_5.7L/troubleshoot_ckp_sensor_1.php

Any codes? Also, clean the MAF and IAC. Even if it doesn't fix it, it's necessary preventative maintenance and is cheap to do.


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