If this goes in 92-99 I apologize in advance.
So I am driving home from class today and the engine kinda hiccups. No big deal, its happened before. Did it a couple more times, and finally one more bad enough that it threw a code. Pulled over right away to make sure my new intake was intact (was hoping I wouldn't open the hood and find my RX-4750 collapsed in sucked into the intake pipe
). No problems there, got back in my car and the engine died. Crap. Went to start it, no go. Tried again and it started up. Drove 5 miles home and just had some minor power issues and hiccups and what not.
Got home, got some chow, got in my car to get the codes pulled. No CEL, no engine problems what so ever. Get to the shop, $35 later I have codes 321, 341, 361.
I don't see any codes like this in my Chilton'* (shoulda gotten a FSM). Here is the explaination from the shop. One of them is "Intermittent No Cam Signal." One is "EST" (??) and the other is unrelated.
So it could be my CMP...thats like a $40 part or so.
But then while there, the guy told me about a Bonneville that they had in there within the last month. Here is how I interpretted what he said. There is a magnet inside the timing chain housing which is either on the cam, or rotates with the cam...what ever. The CMP sensor reads this magnet. The magnet on the Bville they recently saw was loose. So sometimes it would sorta move a bit to the point where the CMP sensor couldn't read it. Either it did, or it could, eventually fall off. When this happens the car will die and it will not restart until it is fixed.
He said one of three things could happen. It could never happen again (but something similar has happened in the past, but not enough to throw a code), it could get worse and worse and happen more frequently, or eventually the magnet will fall of with no warning and leave me stranded.
He also said if it was the magnet it would cost $400, mostly in labor because they would have to take the "front cover" off of the engine.
I guess I am just curious, have you ever heard about this. I have never read about it on here before. I know all about the camshaft position sensor with the wires going bad, but never about the magnet on the cam. What gives?