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Can i gravity feed the gas if its carburated even tho it had a fuel pump

Bike stopped running right after putting a new fuel relay switch on

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  • Cars & Trucks Master
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Yes you could gravity feed. Check the fuel VOLUME. there is a screen that gets blocked up inside most fuel tanks. Worse with ethanol fuel...

Posted on Feb 07, 2012

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I installed a fule pump and started right up, and then stopped runing again, I was going to clean fuel filter, and fuel kept flowing throuule the fuel line. I changed fuel pump relay five times, I...


Maybe the oil pressure sensor or switch that keeps the pump running after engine started.

If you jumped 87 and 30, it should have turned the pump on. If those are the right terminals at the fuel pump relay, and I think they are. Those are usually the right ones.
Try this: one of those terminals should be hot at all times, the feed for the fuel pump. Check for a hot terminal there. If the feed for the pump is lost, it will probably be a blown maxi fuse or fusible link supplying that relay's power feed.
If it still starts and dies, check the fuel pressure. If pressure is at specification, both key on, engine off and with engine running, it could be an ignition problem (crank sensor?), not a fuel problem. But you may be right to pursue the oil pressure switch or the pcm, if the pump was still running as you say at the fuel filter .

At terminals 85 and 86 of the pump relay, you could check for the computer signal on one of those with the engine cranking. With engine cranking, the computer sends a signal to the coil side of the relay, either the 85 or 86 terminal, and the other terminal will go to ground. Do you have a test light or voltmeter?

Apr 26, 2014 | 2002 GMC Sonoma Extended Cab

1 Answer

Ireplaced the fuel regulator and fuel pump now i smell gas in the rear of the car and its coming in the cab area when i put gas in the car and drive its real strong and it appears the gas burn quickly even...


1 thing is to make sure you have the right size fuel pump for your engine. A ****** put a 2.2 pump on my 2.5 as soon as this was fixed the gas smell stopped. a new carburator also might do the trick....unfortunately i have had to replace almost every part on my sundevil good luck with yours

Jun 24, 2011 | 1994 Plymouth Sundance

1 Answer

Done head gasket mate put manifolds on now fuel pump diont work no power to pump power at relay starts with blast of fuel no power from compurter to pump


computer doesnt control pump relay on such a old vehicle ,you have a fuse out or old dirty connections on the base of the relay so if all else fails then run a new feed wire to relay depending on which power point on relay has no power ,if its the feed from ignition to operate relay make a new feed from ignition switch and if no power to pump side of relay then run a new feed to this via a fuse .simple to sort out on such an old vehicle

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1 Answer

If you put gas in the carburator engine run fine after you shut off vehicle engine will not start


Sounds like your fuel pump isnt pumping and you are feeding it gas so it thinks it has enough. Pressure might even be low if you check it, if it is working at all.

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Fuel pump constantly runs, even when ignition switch is off. 1991 Chevy C1500. Put on new relay switch, but the pump is on, even with relay disconnected


sounds like you haven't got the right relay or the replacement has failed. pull one relay at a time and go back to the rear of the vehicle and listen for the pump. make sure the key is on when you do the test.

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Fuel pump may be getting weak. If pressure is not high enough the injectors wont open.

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1 Answer

Fuel pump continousley runs even when the car is turned off


try disconecting the power from the vehicle all together this should reset it. some vehicles actually have a fule bump switch on them (normally in the trunk)

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I put a new fuel pump, fuel filter, and a fuel pump relay and the fuel pump is still not coming on. I am not getting any fuel. Can you please tell me what it might be.

Mar 08, 2009 | 1993 Chevrolet C1500

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