Hei!
Har problemer med bensin pumpa/bensin pumpe rele og lurer på om dere har noe forslag på hva det kan være å hva jeg kan sjekke!
Setter pris på alt!

 

this forum is pretty much english/american language only.

i gather is bensin refers to gasoline, but not sure what you're asking for specifically.

a 1992 740 might be normally aspirated Bosch LH 2.4, it might be turbocharged Bosch LH 2.4, or it might be normally aspirated Regina ... each of these uses different fuel pumps The Bosch injection systems have two fuel pumps, a 'transfer pump' inside the fuel tank and a high pressure pump under the car... The Turbo uses a higher flow rate pressure/main pump. Regina has only a main pump inside the gas tank.

 

He wants to know something about the fuel pump relay. If I recall, you previously described how to jump the relay to test the pump.

 

ok, I ran it through google translate...


easiest way to test that relay is to temporarily swap it with the identical relay from a working car.

that relay actually has two separate relays in it, one turns on the ECU and other injection infrastructure, and the 2nd half of the relay actually controls the fuel pump.

to 'fake' the relay operation, pull the relay out, then in the relays socket, you would need to jumper pins 3(30), 8(87/2), and 1(87/1) together. this will immediately power the fuel pump AND the injection system (pin 3(30) is always powered, so be careful not to short that jumper wire to ground), and turn on the ignition and the car should start and run. be SURE to remove this jumper immediately after shutting off the car, I would remove the pin 3(30) first as its the power.