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Posted on Jan 02, 2017
It sounds like the float on the sending unit is sinking. Don't know what the float is made of, but over time, it will soak up gas and start to get heavy. This would cause your problem. I don't think it's the gauge, but if you want to test it, disconnect the wires at the tank. The gauge will either go to full or empty. If you ground the sending wire, the gauge should respond the opposite way it was. good luck
Posted on Feb 12, 2010
SOURCE: I have 1986 Alfa Spider that won't start. Car has been sitting for a year. I replaced battery, fuel tank, fuel sender unit, both fuel pumps. I seems that the in tank pumps is not getting any po
Could be the main or fuel run relay located in the compartment under the luggage rack, passenger side, main relay also, fuse for the fuel relay 8amp. Electronic Control Unit is also located there.
Could be electrical, Hook up a timing light, three leads: Power, Ground, and one that goes around the wire to #1 cyl. Turn the engine over and see if there's firing. Note: u can check all 4 spark plugs this way.
Fuse lead goes to pin 30 of the fuel relay, u can jump 30 across to 57 and check for the pumps running, if not, change-I suggest both relays, main and fuel run relays. Both pumps get their 12v DC from the fuel run relay, both should be running when you switch ignition switch to on, then a tachymetric signal is fed from the coil to the relay to keep it running.
Posted on Jun 22, 2012
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