Ok, today I went out and started my 240 to go to school, and I made it a half mile down the road when it started stuttering and it died on me. I came back to it after school and it started up with a little delay and drove home just fine... so I'm thinking fuel filter is clogged. I buy a new one (Fram), put it on, won't start at all. So I pull the hose going into the fuel rail, set it in a cup I placed on top of the motor and cranked the engine, and I got no fuel to come out whatsoever. So I'm thinking fuel pump.... but I didn't hear any noises coming from it... anybody else had this problem? If so, how did you fix it?
PS. Sorry this was so long
fuel pump bad?
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Touchdown038
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Yes, it definitely sounds like a bad fuel pump. Also check the fuel pump fuse to see if its blown. I think its labeled (EGI Pump) on the fuses located by the battery. Have someone turn the car from the off position to the on position while you place your ear by the gas cap. You should hear a whirring noise for 5 secs and then shuts off. If no noise, definitely the fuel pump.
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Touchdown038
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Fuse looked good when I pulled it out to relieve the pressure. Now when I start it, it will have a VERY shaky idle for about a second or so and then the RPMs will drop, and giving it gas does very little if anything to keep the RPMs up. So... is there a way to test the fuel pump outside of the car before I go and drop $150 for a new pump?
I mean, maybe you can take it to a mechanic and they'll have some way of testing it. I really don't know. Also, you didn't mention this, have someone sit in your car, turn the key from off to on while you have your ear pressed against your gas cap door. You should hear a whirring noise, if no - then its definitely the fuel pump - if yes - the pressure may just be weak do to a bad fuel pump. But the answer is pretty much slapping you in the face. You said you removed the fuel sender line - cranked the car - and no fuel came out. I just did the same thing today - and mine gushed out. Maybe you should check the Nissan salvage for one, possibly upgrade to a 300ZX TT.
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Touchdown038
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True, true. Without upgrading the injectors (or pressure regulator) along with ECU, cams, TB, etc, there's no benefit to upgrading to a higher-pressure/volume pump. A used one will be cheaper than a new pump, but who knows how long it would last. Go with factory...avoid cheap ProStart parts. Disconnect the pump harness and measure the resistance of the pump with the car off. Should be about 1ohm, probably a little less. Then disconnect the injector fuse and have someone try to start the car while you measure voltage from the harness going to the pump. Should be at least a few volts. One of these tests will probably help you narrow down the problem. If not, then maybe you have a clog in the fuel line somewhere. You can also hook up a 6V source to the pump directly to see how much fuel flows out.
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Touchdown038
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Alright, so I need to update to tell about my latest problem... so I bought the new pump and installed it and went to start... nothing, no noise even when I turn the key. So I take it all apart again and hook it up straight to the battery, bingo, it's in action. So I'm thinking that my problem lies somewhere within the wiring to the fuel pump. Does anybody know exactly where the fuel pump gets its power? I know there's the fuse, but then there's 2 relays also, the EGI and EGI pump relays. Any info on this would be great.
PS. I hooked up the old pump straight up to the battery also, barely any action at all, so that was just the start of my problems!
PS. I hooked up the old pump straight up to the battery also, barely any action at all, so that was just the start of my problems!
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Touchdown038
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Touchdown038
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- Joined: Tue Dec 31, 2002 1:55 pm
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I checked the power in the positive wire coming from the pump assembly itself, and yes it said 12V for about five seconds when I turned the key on. And I never ran either of them for more than a second with no gas. Could I have possibly bought a defective pump? If so, Schucks is gonna be getting a visit soon.
