Jon K
09-27-2006, 05:05 PM
Hey guys I am trying to make my stock tach work off of my MegaSquirt ecu. What type of signal does the stock tach see? Is it 5v or 12v? Or something else? Please help! This is on a 1992 BMW M50 with Motronic 3.1, its pin 74 on the engine harness.