Last month, a 1992 BMW 325i (M50B25, Motronic M1.7) came in with crank but no start. Fuel pump didn’t prime. A novice would throw a pump at it. Instead:
A common failure point is the DME (Motronic) relay, which can cause intermittent stalling or rough idling if its contacts are corroded. bosch motronic ecu pinout
Thick, low-resistance pins connected directly to the engine block or chassis. Last month, a 1992 BMW 325i (M50B25, Motronic M1