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ej2civic
08-09-2006, 10:23 AM
alright well i bought my car about a month ago as kind of a project. i got it home worked a few things out and now it wont start. i was checking the power to the fuel pump and one terminal has full 12v power and another has very weak power. The one that is very weak seems to go to the fuel gauge sensor so would it have weak power because it doesn't need power or could that be why my car doesn't run, or do i just need to replace the pump. If the low power is the problem what would i do to go about fixing it. I have replaced the relays and that didn't help and my fuse is good. Any help would be appreciated.

-Travis

oh yeah its a 1990 hatch with the stock sohc (for now)
NemeGuero
08-09-2006, 03:50 PM
if your fuel pump is getting 12v.. why do you think its the fuel pump that's the problem?

Are you getting fuel pressure to the rail? If so, don't worry about the pump.
Buy a fuel pressure tester.. and while you're at it.. test the FPR. as you revv the engine up, the pressure should increase.

If you're getting fuel, test ignition. Are your plugs firing?
ej2civic
08-09-2006, 04:13 PM
i am not getting fuel. there is no pressure in the lines thats why i thought even though the pump is getting the voltage it isn't doing anything with it.
NemeGuero
08-09-2006, 04:19 PM
read in the FSM about what the voltages should be, and where for the fuel pump.

If its getting volts and not pumping fuel, your pump is done.
ej2civic
08-10-2006, 07:21 PM
there is nothing else it could be. i heard somewhere that a bad burned comp could also cause this aswell and i think the guy before me said it has a burned comp.
NemeGuero
08-10-2006, 07:31 PM
give it a shot but I think if the pump is getting 12v and isn't pumping.. its just a bad pump
ExpressFuelPumps.com
08-24-2006, 02:45 AM
Sounds like a bad pump to me. We sell replacement Walbro's for $85 in this thread http://www.zilvia.net/f//showthread.php?t=117565
johngriff
08-24-2006, 03:33 AM
expressfuelpumps.com huh? Sweet, what is the fing deal with OEM 300zx twin turbo pumps, i need them , all the time since they are the uber 15 year ish, and i need a good price.

Thanks!

Oh yeah, and put your ear to the sending unit with key on, you will hear the pump if it is working. If you have voltage.. pump is burned.

DO NOT FORGET.

YOU DO NEED THE ORING FROM THE DEALER

CROSS TIGHTENING AND LOOSENING IS EVERYONE'S FRIEND!!

-j