No power

[Law Dog]

Fuel pump relay did you try that? The Gold relay next to the ECU.

Ill tell you what I have been going through maybe you can get something out of my mess. Bought a nice 91 D50 3.0 A/T not running it came with 2 fried ECUs. I sent both in to get rebuilt but they could only fix one of the 2, one was toast.

My AIC on the throttle body was stuck that’s what was frying the ECU change yours out before trying that other ECU! So my ECU came back rebuilt I put on a new AIC and it ran but the fuel relay buzzes all of the time except when it was running even with the key off the battery cable had to be taken off of the battery to keep from draining the battery.

Tried a new relay same same so I’m waiting on another rebuilt ECU to try to help eliminate that if it’s not the problem. I have a 10-15 second delay before the buzzing starts not sure why the delay. I did send my rebuilt ECU back but no change when I got it back.

[Merg]

Fuel pump relay did you try that? The Gold relay next to the ECU.

Ill tell you what I have been going through maybe you can get something out of my mess. Bought a nice 91 D50 3.0 A/T not running it came with 2 fried ECUs. I sent both in to get rebuilt but they could only fix one of the 2, one was toast.

My AIC on the throttle body was stuck that’s what was frying the ECU change yours out before trying that other ECU! So my ECU came back rebuilt I put on a new AIC and it ran but the fuel relay buzzes all of the time except when it was running even with the key off the battery cable had to be taken off of the battery to keep from draining the battery.

Tried a new relay same same so I’m waiting on another rebuilt ECU to try to help eliminate that if it’s not the problem. I have a 10-15 second delay before the buzzing starts not sure why the delay. I did send my rebuilt ECU back but no change when I got it back.

the gold relay next to the ECU is the ECU relay, not a fuel pump relay. Although, if that relay has gone bad, the fuel pump probably won’t turn on because the ECU will have no piwer going to it. You can check to see if the fuel pump is working by jumping 12v+ to the white test plug on the passenger side of the engine bay. It is right next to the timing ground pin(brownish color).