MARTIN

I have a problem with my cas, and/or microtech. My MT isnt picking upp the signal from the cas during startup. It happens sometimes, when the car is cold. Once its warm it doesnt do this. I crank and crank and on the rpm screen it stays blank. This is the second cas I put on the car, and it ends up being the same ****. I have to adjust the magnet to get closer to the teeth. I performed this on my first cas, but then it started doing the same thing, which is why I replaced it. Any ideas?