Update Cam Sensor woes still unsolved!!
Thread Starter
TECH Regular
Joined: Nov 2001
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From: Texas
Update Cam Sensor woes still unsolved!! For everyone who hasn't read the old thread about my cam sensor problems here is a brief summary of what has happened. I went to start my car, it was hard to start and the SES light came on. P0343 cam position sensor high output, I replaced the sensor and the code remained and the car was still hard to start. Took it to the dealer and they gave me the run around and said my PCM must be bad.
After talking with several people one name kept coming up who they were sure he could fix my car. It has been at his shop for three days and he and I both are puzzled. The PCM is fine and so is all the wiring. With the cam position sensor out of the car and you car wave a metal object back in forth in front of it and the computer sees the signal. That rules out the sensor, wiring, and the PCM. The problem is when you put that same sensor back in the car it picks up nothing (shows a flatline on his scope). With a mirror and a flashlight you can look down inside where the cam sensor sits and see the reluctor ring on the cam and it is not damaged. What is going on and what do I (him) need to check next? Everything works during the simulation but you put it in the car and get nothing. Somebody give me some direction here
After talking with several people one name kept coming up who they were sure he could fix my car. It has been at his shop for three days and he and I both are puzzled. The PCM is fine and so is all the wiring. With the cam position sensor out of the car and you car wave a metal object back in forth in front of it and the computer sees the signal. That rules out the sensor, wiring, and the PCM. The problem is when you put that same sensor back in the car it picks up nothing (shows a flatline on his scope). With a mirror and a flashlight you can look down inside where the cam sensor sits and see the reluctor ring on the cam and it is not damaged. What is going on and what do I (him) need to check next? Everything works during the simulation but you put it in the car and get nothing. Somebody give me some direction here
What mods do you have? What did you change, if anything, before this problem popped up?
If the sensor can't see the trigger portion on the cam it might be clipping out. When was the cam changed?
If the sensor can't see the trigger portion on the cam it might be clipping out. When was the cam changed?
Thread Starter
TECH Regular
Joined: Nov 2001
Posts: 450
Likes: 0
From: Texas
Originally Posted by Pro Stock John
What mods do you have? What did you change, if anything, before this problem popped up?
If the sensor can't see the trigger portion on the cam it might be clipping out. When was the cam changed?
If the sensor can't see the trigger portion on the cam it might be clipping out. When was the cam changed?
Thread Starter
TECH Regular
Joined: Nov 2001
Posts: 450
Likes: 0
From: Texas
I just got back from the shop where my car is and guess what the cam has walked! Whats weird id, it didn't come forward it walked backward about a quarter inch. The lifers are so far forward on the lobes that an area about the thickness of two sheets of paper of the roller lifters are not even touching the lobes. It would make sense if the cam plate bolts loosened the cam could walk forward, but how in the hell did it walk backwards?
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