Chrysler Repair: 1995 chrysler lhs came in..., 1995 chrysler lhs, chrysler lhs

Question
1995 chrysler lhs came in for overheating but otherwise ran good. The mechanic was fairly new. While assemblying the heads and timing belt, he damaged the left cam sensor ring. After replacing both timing belt gears the car would not run wery well. I came in to look at the car and asked if they replaced the cam sensor and they said yes. After a quick scan with a snap on box I could see the cam sensor droping out at various times and immmediatally come back. coil for 3 and 6 was droping out. I ohm tested the coil and they all range about 12620 ohms, well within tolerance, Then I ohm tested the signal from the cam sensor to the computer(6 ohm) I cleaned the connections and checked power at the cam sensor and the reference signal and it all seem to be good. In funciontial tests, I checked each coil pack output and the insectors as well as the spray pattern. I see the tach drop 1000 rpm when the cam sensor turns on and off. The air gap seems to be correct but I cannot get the engine to run right and I lose the signal. I used the factory tools to set up the cams and checked all the wiring. Frankly I am running out of options, I just wish I was there when the mechanic took it apart and put it togather! Any Help Would Be Appreciated. p.s. it is a 3.5 motor. Chris

Answer
Hi Chris,
You are more expert than me on this problem, I suspect. But I would suspect the issue is still with the cam sensor ring and/or the cam sensor. I notice that the #3 and #6 slots are on opposite sides for the ring. I wonder if the ring is really maintained at a constant distance from the sensor to the degree necessary to get a reliable signal. Could the shaft be bent? How about using a dial indicator to measure the variation in the location of the ring through its entire 360 degree rotation? I don't happen to know the specific spec but the similar side play spec for the distributor shaft when the Hall sensor is used there is 0.1 mm/0.004" The requirements are tight, thus the paper spacer used to set it up when new.
Of course you are taking their word for the sensor replacement and the cam gear/ring replacement. If you can't get to the bottom of this wouldn't the shop be legally responsible for its resolution? Maybe you need to put it back in their lap, and failing that small claims court.
Roland