The Mopar two wire magnetic pickup, as reliable as it is, doesn't play well with computers. Many many people have issues getting a reliable, readable signal for the computer. The Jeep CPS and many others are a three wire hall effect sensor. The computer sees the signal from the hall effect as either on or off, high or low, voltage output or no voltage output. The Mopar magnetic pickup outputs a sine wave amplitude that usually varies too much for the computer.