dualcitizen
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- Joined
- Jul 1, 2018
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Hopefully someone can help me here. I don't understand exactly how the fuel system works on this car. As the title suggests, the car won't start. It won't even hiccup. I've checked for a spark and that seems to be fine so I don't think there's an issue there.
I'm pretty sure the issue is no fuel, but I'd like to understand what to look for. Here are the details and what I know.
Key on, no sounds. Fuel pump does not start. I understand that there are two pumps, one in the tank and one underneath. Should I be hearing both pumps before cranking? (I don't hear either one)
Since I couldn't hear the fuel pump(s), I disconnected the wires and checked the voltage on the pump underneath the car. 0 volts when key turned on. Afterwards, I applied 12 volts directly to the fuel pump terminals and it turned on. While the fuel pump was running, I check the fuel rail at the little twisty nub thing by first injector but no fuel came out, totally dry. Tried starting the car again with the fuel pump wired up but nothing.
Checked the relays behind the fuses (fuse #1 is good) and jumped the relay terminals on the fuel pump relay (87/2 - 30), found a guide here: https://www.240turbo.com/740relaybypass.jpg When I did that the fuel pump kicked on. Pulled the relay out, took it apart, nothing seems to be fried or burned inside. With a power supply I was able to verify that the solenoids were activating and that there was 0 ohms across the switched terminals, therefore relay seems okay.
I'm a bit unsure about what to look for now. Any advice would be greatly appreciated.
I'm pretty sure the issue is no fuel, but I'd like to understand what to look for. Here are the details and what I know.
Key on, no sounds. Fuel pump does not start. I understand that there are two pumps, one in the tank and one underneath. Should I be hearing both pumps before cranking? (I don't hear either one)
Since I couldn't hear the fuel pump(s), I disconnected the wires and checked the voltage on the pump underneath the car. 0 volts when key turned on. Afterwards, I applied 12 volts directly to the fuel pump terminals and it turned on. While the fuel pump was running, I check the fuel rail at the little twisty nub thing by first injector but no fuel came out, totally dry. Tried starting the car again with the fuel pump wired up but nothing.
Checked the relays behind the fuses (fuse #1 is good) and jumped the relay terminals on the fuel pump relay (87/2 - 30), found a guide here: https://www.240turbo.com/740relaybypass.jpg When I did that the fuel pump kicked on. Pulled the relay out, took it apart, nothing seems to be fried or burned inside. With a power supply I was able to verify that the solenoids were activating and that there was 0 ohms across the switched terminals, therefore relay seems okay.
I'm a bit unsure about what to look for now. Any advice would be greatly appreciated.