Hey guys! Thanks in advance for your help! Here is my deal:

I have a 73 240Z. It won't start. If I spray starter fluid into the carbs it will run for second and then die. I no longer hear the fuel pump kick on when I turn the ignition. I also don't see any gas come in the fuel filter. That makes me assume the fuel pump has died. It's been sitting untouched for a couple months at a friends house and I need to move it as soon as possible.

Now to my questions. I feel strongly the fuel pump is dead. How do I check the wiring to make sure some connections just didn't come loose. I'm not sure where the wiring harness runs back there. (I checked the fuse panel in the dash and none of the fuses look blown) If it connections and fuses are good what's the process in replacing the pump? Thanks again for any help!

Edited August 4, 200915 yr by zman112233

Use a volt meter back by the pump with the key on. See if you are getting any voltage to the pump it's self. Didn't your Z have a manual pump as well as the electric one? Our 72 only had a manual fuel pump and no electric. At one point we had an issue with the pump picking up crud from the tank and clogging the fuel filter. Do you have a repair manual for your car?

The wiring to the pump comes from near the right rear taillight down through the floor. It is with the wires to the sending unit in the gas tank. Up under the dash next to the center console ,between the heater and the console. look for a green wire coming from the right side of the car. There is a in line fuse in the line . check that fuse with a meter , don't just look at it. The same with the other fuses in the fuse block. Sometimes they fail but still look good. Between the electric pump and the tank there should be a in line fuel filter. It could be plugged, a possibility. If you can , have some one turn the key to the start while you are testing the green wire back by the pump for power. Some Zs have a cut off on the pump when there is no oil pressure but will power the pump when in the start mode. Hope this helps.

Gary

Ok, here's the update. I climbed under the car and found what should be the wires for the fuel pump back by the gas tank. The problem comes in the fact I can't find any place they were connected! I found the fuel gauge connection, but no place to plug in a fuel pump. It doesn't look like the wires were ever connected to anything. (Two wires, a black wire and a green wire) I tested the wires and there is no voltage to them. I couldn't find the green wire under the dash you were speaking of. Maybe I wasn't looking in the right place? Is it possible there is no electronic fuel pump on this model but there is wiring for it?

Thank in advance for your help. I'm desperate.

It is possible that you have the wiring and no fuel pump. I have a 73 and I eliminated the electric when I installed my new (OEM) mechanical pump. I think its pretty common to eliminate the electric.

Same here, I have wiring but no electric pump. You can test the mechanical pump by taking it off the car, (submerge tubes in fuel) squeezing the lever and fluid should shoot out.