I learned something a week ago about the white relay next to the fuel pump relay (2x orange 1x white) which sits under the plastic shroud next to the airfilterbox.
These relays were back in the day when the E30 and other BMW's with the M20 were the latest and greatest replace by the garage due to them being faulty.
The symptoms are sudden engine failure and or difficulty to start. Bascially this relay pulls the power to the ecu, and so if it doesn't pull the injectors don't open and hence the engine doesn't get any fuel.
The mechanic that demonstrated it for me took a screwdriver and while the 325iX, which was having start problems, was tiking over he tappet the relay with the screwdrivers handle and every time he tappet the relay the engine would die and then come alive again.
So if in your search, try the white relay. Bosch and others make similar relay, if the function principle and the pin configuration is the same, it should work fine, just don't new old stock
All these electronic gremlines make me wanna get a Diesel with mechanical injection. Nothing can stop such an engine other than lack of fuel.
Why is there not enough time to do it right, but allways enough time to fix the errors - I borrowed that, just so reallistic in my line of work.
but when I came to leave work i was relieved that it started! It ran fine for about 20 seconds ish and then just died and hasn't started since. I have fully charged the battery and stuck a bit more juice in it as it was low. This had no effect, it will still just turn over but not even hint at firing. I cant hear the fuel pump prime with the ignition on(which it did do before) or when it is turning over but if I jump the relay you can hear the fuel pump. I have tried another ecu, but this didnt help, as i had a spare one from previous trials and tribulations! Any ideas? Ta, Ben
