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.
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 wasnt 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.
2nd edit:\
checked the power on the end of the fuel pump thats located underneath the bench while the terminal 30 and 87 is bridged. There is no power going to the fuel pump plugs. The fuel pump relay gets power but not power to the fuel pump plugs on the back. The main relay stops buzzing when I remove the fuel pump realy and plug a bridge between 30 and 87 or it stops buzzing if I remove the 3 wire connector thats next to the ECU connector. Theres power to the main relay and power to the fuel pump relay. I am lost....I thought this shit was supposed to be plug and play.
There was also an alarm system that seemed useless because it didnt look like it worked. I unplugged the whole wiring for that crap and put everything back together inside the knee panel on the drivers side. Most of the wires were "T" wired and made the job easier. What I dont see is my OBC box? I only see my ABS module but im missing that module for the OBC is it inside the dash? Do i need to remove dash to get to it? Also there is an orange plug that is hanging there not connected to anything...thats all thats not plugged. Traced all the wires and none ofthem have wiring tape as in none of them seemed molested, only the wires for the alarm which was a purple wire, red wire, and a green wire. Those 3 seems to come from ignition switch. Other than that everything seems fine. I am stressing so much I cant find the solution to this crap.
Got it to start after changing the ground wire from ECM that was on frame, changed it to top of strut tower.
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.
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 wasnt 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.
2nd edit:\
checked the power on the end of the fuel pump thats located underneath the bench while the terminal 30 and 87 is bridged. There is no power going to the fuel pump plugs. The fuel pump relay gets power but not power to the fuel pump plugs on the back. The main relay stops buzzing when I remove the fuel pump realy and plug a bridge between 30 and 87 or it stops buzzing if I remove the 3 wire connector thats next to the ECU connector. Theres power to the main relay and power to the fuel pump relay. I am lost....I thought this shit was supposed to be plug and play.
There was also an alarm system that seemed useless because it didnt look like it worked. I unplugged the whole wiring for that crap and put everything back together inside the knee panel on the drivers side. Most of the wires were "T" wired and made the job easier. What I dont see is my OBC box? I only see my ABS module but im missing that module for the OBC is it inside the dash? Do i need to remove dash to get to it? Also there is an orange plug that is hanging there not connected to anything...thats all thats not plugged. Traced all the wires and none ofthem have wiring tape as in none of them seemed molested, only the wires for the alarm which was a purple wire, red wire, and a green wire. Those 3 seems to come from ignition switch. Other than that everything seems fine. I am stressing so much I cant find the solution to this crap.
Got it to start after changing the ground wire from ECM that was on frame, changed it to top of strut tower.