Hi Scotty, Im from Croatia and got used chevrolet aveo sedan recently very cheap for around 1200$ , its 2009. 120,000 km with f14d4 engine model. it had some things to on the engine(new seals on the oil cooler, new brakepads etc), the problem i have is with the camshaft sensor position error on the exaust side. tried few new sensors but the error is still there. when the car isnt running for couple of hours( over night) it starts rough and for the first 2 seconds runs on around 500 rpm almost choking and then jumps normally on around 1000 rpm and lowers gradually to around 750. idling. if you could tell me anything from your expirience what could cause this would be great! dont want to tear the entire engine apart looking for the problem. thank you! with respect, Nikola
Did you use the OEM sensor?
havent tried original, but have tested the "faulty" one on other car and it works fine. im pretty sure it isnt sensor
All right those are horrible cars to begin with and generally it means that you have a problem on that side of the engine like a stretch timing chain or a problem with a variable valve. The computer is stupid and if it gets weird data from the sensor it blames the sensor when it can actually be the timing chain has stretched and it gives incorrect data because it's stretched and no longer sinks with the other sensors in the engine or a problem the variable valve timing that it moves back and forth and then gives bad data again from the sensor
ive allready put new variable camshaft pully and valves both on intake and exaust side, it has a timing belt, and everything seems to be in order and phased right, checked multiple times with couple of services. the only thing that comes to mind is that ecm is bad but then it wouldnt be just exaust side error. or it could be problem with camshaft itself on the exaust side( maybe the petal broke that passes over sensor or something). its an enigma and im really starting to lose my hair over it.
Since the camshaft position sensor controls the ignition timing, has it been set properly with a high level scan tool? Just an alternative place to look.
