babason

Hi guy s can any one tell me how to bypass this relay I cant find a wiring diagram 4 this vehicle due to its age. The beast in question is a 2.2 1996 c class . it starts when it feels like or not at all. Fuel pressure is good and fuel pump relay is also okay. when it does start it will run for anything from 2mins up to 10mins and then cut out. with no loss of fuel pressure. The ignition system is hfm. when it does cut out it looses spark to plugs. so it must be something in the ign system me thinks, or the control unit itself.

appreciate any ideas at all/ or test procedures.

thanks