Fuel pump voltage required
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6th Gear
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Fuel pump voltage required
My 1982 CE fires and dies, no fuel from pump after initial start up. Of the three terminals at the pump I am getting 9+v from the center tan terminal and 7+v from the outside brn/wht terminal. I know about the ECM and oil pressure sensor coordination. I have checked and replaced almost everything except the relay. What is the required fuel pump voltage?
Thanks,
terntes
Thanks,
terntes
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From: New Or-leens Loo-z-anna
Do an internet search about 1982 Corvette fuel pump wiring and voltage...2 of the wires get 9V/7V
What color wires do you have?
you can also request a free wiring diagram from...
https://www.corvetteforum.com/forums...or-anyone.html
What color wires do you have?
you can also request a free wiring diagram from...
https://www.corvetteforum.com/forums...or-anyone.html
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I don't know the wiring schematic for a 82 either. I do work with fuel injection almost daily however.
one of those wires must be for your level sender.
Fuel pumps have 2 wires. Power and ground. And 12.5 - 13.5 volts with the pump temporarily disconnected would be what I would be looking for. If you don't have a schematic, you could simply pull the pump and follow the wire to it.
one of those wires must be for your level sender.
Fuel pumps have 2 wires. Power and ground. And 12.5 - 13.5 volts with the pump temporarily disconnected would be what I would be looking for. If you don't have a schematic, you could simply pull the pump and follow the wire to it.
Thread Starter
6th Gear
Joined: Dec 2013
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My quick internet search did not yield any answers to voltage or on Youtube. So, I joined the Corvette forum where I know the answers are. My voltage was 9+ and 7+ on the two wires. The engine still just fires for the initial ECM burst then won't pump any more fuel. I'm still researching and trying, I may have to run hot wires directly to the pump to see what happens.
Thanks,
terntes
Thanks,
terntes
Thread Starter
6th Gear
Joined: Dec 2013
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Thanks, I do have the two wires but I did not think about the fuel level sender, stupid me! I must have some other problem. The book says I get an initial two second shot of fuel and if the oil pressure sensor doesn't get oil pressure the fuel is cut off. I do get oil pressure just by cranking the engine plus I installed a new sensor and fuel pump. I have not checked the fuel pressure, but when disconnecting the fuel line there is get a good flow. I may just run a hot wire directly to the pump for continuous pressure.
terntes
terntes
Thread Starter
6th Gear
Joined: Dec 2013
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Fuel problems update: I wired direct from a battery to the fuel pump so it will run continuously, but the engine still starts and dies after initial fuel shot from ECM and then no more fuel. I need to check the fuel pressure, but I installed a new pump and filter already, so I assume it is OK.
This is original equipment nearly 200k miles with a lot a vacuum leaks.
Problem solution: swap to carburetor.
This is original equipment nearly 200k miles with a lot a vacuum leaks.
Problem solution: swap to carburetor.
