I have a 2000 Mercedez ml 320. When I first start the car it runs fine, then within less than a minute I lose pulse to all 3 fuel injectors on the drivers side of the motor. I have replaced the ecu twice with re-manufactured re-programed computers and I get the same thing. When I first scanned the car I got a bad ecu and bad quad driver code (Which I believe runs the fuel injection) so, my question is, what else can cause the fuel injectors on one side of the engine to fail? Does the cam sensor send signal to the ecu to run the injectors? If not, what does? ............ I've already tried moving coils around and the same 3 injectors still fail. I don't know where to go from here. Any help would be great. Thanks.