Hi, I just swapped out my 325e engine for a 325i engine. Took the whole thing from donor car. Everything bolted up fine but when i tried to start the car wouldnt click the relays which seems odd. I know where the location of the main relay and fuel pump relay is. The car cranks but it wont start.
When I turn the key on the on position only 1 relay under thedash clicks and thats it. Nothing clicks on the engine bay besides the one inside the fuse box. The car cranks and everything. I grounded everything. Im scratching my head right now. Am I missing something? I tried looking for the pinouts online of the DME but they dont show me the wire colors. Only pin# and its function. I would like to trace the wires and know where they go exactly. I go have some loose plugs. But the main one I guess is for the OBC its a 3 wire plug I suppose its a yellow, green, and black wire. I already connected that. The modification I did on the wiring was the automatic pluc side where I spliced the green wires to the ones in the reverse light switch. Later on I found out that there was a plug in there all along to just plug it in without to splice it.
Any input would be great
prior to this the 325e engine was a run and drive car so iknow the pumps are good. The donor vehicule I dont know much since i bought it wrecked. ECU is a motronic 153
.
edit:
So it looks like the main power to the ECU was hooked up correctly. I hooked it up on the positive. So now my main relay has 12V. The issue now is that the Main relay is buzzing when i put the key on the on position. It buzzes really fucken loud. When I tried to start nothing happened. I also hot wire the fuel pump relay 30 to 87. The weird part is that when I removed the fuel pump relay to hot wire those 2 terminals. The main relay stopped buzzing???!?!?!?!?! WTF?? I also removed the alarm that was on the car it looked aftermarket and i removed the thing. If I remove the hot wired terminal wire, the main relay buzzes again but only when the key is on the on position.
When I turn the key on the on position only 1 relay under thedash clicks and thats it. Nothing clicks on the engine bay besides the one inside the fuse box. The car cranks and everything. I grounded everything. Im scratching my head right now. Am I missing something? I tried looking for the pinouts online of the DME but they dont show me the wire colors. Only pin# and its function. I would like to trace the wires and know where they go exactly. I go have some loose plugs. But the main one I guess is for the OBC its a 3 wire plug I suppose its a yellow, green, and black wire. I already connected that. The modification I did on the wiring was the automatic pluc side where I spliced the green wires to the ones in the reverse light switch. Later on I found out that there was a plug in there all along to just plug it in without to splice it.
Any input would be great
prior to this the 325e engine was a run and drive car so iknow the pumps are good. The donor vehicule I dont know much since i bought it wrecked. ECU is a motronic 153
.
edit:
So it looks like the main power to the ECU was hooked up correctly. I hooked it up on the positive. So now my main relay has 12V. The issue now is that the Main relay is buzzing when i put the key on the on position. It buzzes really fucken loud. When I tried to start nothing happened. I also hot wire the fuel pump relay 30 to 87. The weird part is that when I removed the fuel pump relay to hot wire those 2 terminals. The main relay stopped buzzing???!?!?!?!?! WTF?? I also removed the alarm that was on the car it looked aftermarket and i removed the thing. If I remove the hot wired terminal wire, the main relay buzzes again but only when the key is on the on position.