All the really bad stalling or hot start issues on L-jet are electrical.
I had a problem where the car would stall when the cooling fan would come on. Later, the car would get to the point where the engine would be off but the injectors and coil would be firing with key in. I thought it was the ignition amp. or hall sensor.
I tried swapping spare afm, ecu, ignition amp., fuel pressure, combo relay, coolant temp sensor...
I found that the ground wires to the ignition amplifier seemed to be kinda strange. I moved the ground wires under the coil on the Milano from the lower nut to the upper nut and all problems disappeared. Seemed like the lower nut point had excess resistance for whatever reason.
If you ever have a flooding situation, pull the coolant temperature sensor connector off and proceed to crank the engine. Once you hear some attempt at combustion, reattach the plug. The coil will fire this way but the ECU won't. It works great for weird situations where the car won't start from flooding.
2011 M3 e90 ZCP no sunroof, 2004 M3 e46 no sunroof , 1987 Milano 24v, 1987 Milano Verde
Last edited by Potenziato; 05-07-2017 at 03:01 PM.