Cam sensor it also linked to the crank sensor usually if the cam sensor fails around the same time the crank can become un synced with the replacement. or the new sensor is not the correct one, ie sensor from a 1998 model will sometimes work on a 2005 model if it has the same ecu fitted in the 2005 not the hole ecu but the chip. on the cam sensor there is say in some cases 3 poles positive feed negative and then signal. on all the poles there is a resistance between poles that the ecu reeds. it reads the voltage being used and the signal its receiving if one of these is wrong but it detects one of the readings being right it will think the other sensor is wrong. and thats a mis match. the resistance changes over time.
SOURCE: 2001 chevy blazer
Thats exactly what it is , have the same problem with my ASTRO VAN , replace twice in 2 years average. hope this helps AJ
SOURCE: truck stalls
What are the trouble codes? Recently had 0171 and 0174 codes. Engine coughed (or sneezed) upon a start one morning producing this problem resulting in very rough idle and stalling within 2 min of idling. Problem was vacuum hose blown off fuel regulator which is near impossible to reach without removing intake maniforld since the regulator is located between engine and firewall on 5.4l.
Jim
SOURCE: cam shaft sensor & air conditioner
I replaced the Cam Shaft Sensor. I also cleaned the Throttle Body with carb cleaner. I had my wife hold down the accelerator, while running I sprayed down the throttle plate and the entire area around it. Now my TB finally idles smoothly, and it hasn't died yet!! Check engine light is gone and I passed the emissions test!! Yea!!!
SOURCE: 1998 528i bmw cam shaft sensor location
hope this helps .
http://picasaweb.google.com/mmm635/CamshaftPositionSensorsCamshaftPulseGeneratorsAsBMWCallsIt#
not the same year but should be same place.
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