Question about 1989 Honda Accord 4 Door

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1989 honda accord fuel pump or relay not working

When i bypass relay for fuel pump fuel is fed to carb, is it the relay or switch or pump? carb engine. car runs until carb runs out of gas

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  • Anonymous Mar 11, 2009

    1989 Honda problem with gas plum help me how to fixxx...

  • Anonymous Mar 25, 2014

    car not getting gas to the moter is there a relay or something

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I know that you want a simple answer but, have you done any troble shooting steps at the pump its self? when the relay is in does it pump at all? what is your lin pressure?

Posted on Jul 03, 2008

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Posted on Jan 02, 2017

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1 Answer

How To bypass the Fuel Pump Relay


Don't bypass the fuel pump relay . power to the relay comes from the ignition switch on start cycle .when the engine is running the oil pressure switch takes over the circuit .so if you crash and the engine .stops so does the pump . If the fuel line brakes a bypassed pump will keep pumping spraying fuel and you could burn.

May 05, 2014 | 1997 Nissan Maxima

1 Answer

I have a 1989 chev s10 4.3 that will not crank unless i put gas in the carb. once I do that you can drive as long as you want to until you cut it off then you must do the same thing..what in the world


There is a problem with the fuel pump relay's wiring: What turns it on to prime the line to the injector is the computer signal to the coil side of the relay. This should happen when key is turned to on, about a 2 second signal from the computer. Then, when the engine is cranking, the computer should also signal the relay, keeping the pump on till running. After engine is running, the pump is kept on by the oil pressure switch.
Depending on how the wiring is set up for the relay, the computer will either send a signal to the coil side of relay, and coil side then goes to ground, OR computer may ground the coil side of relay, causing it to energize, and send power to the pump. Check for the computer signal to the relay. The power feed is there for the pump or else it would not be running. Something is wrong with the coil side wiring for the relay.

Nov 22, 2013 | Cars & Trucks

2 Answers

Where is the ecu located


The fuel relay should be under the speedometer, and the ecm should be under the passenger seat.

Dec 05, 2012 | 1985 Honda Accord

1 Answer

I have a new pump and there was no power going into it. so i ccut the wires and want to run it to another power source. can i run it to the fuse box and it work the same? also since its fuel injected i...


did you check the fuse for the fuel pump you don`t say.there is also a fuel pump relay in the system.if you bypass the system then the ecm won`t have control for the pump,which controls the 2 second prime at the beginning when key turned on and it won`t shut off the pump in case of an accident when the engine stops.you can bypass it but its not recommended because this.if you do bypass make sure you have a 25amp fuse wired into the power wire and a on/off switch that you must remember to turn on and off every time you drive the car.

Mar 31, 2011 | Chevrolet Caprice Cars & Trucks

1 Answer

1986 f-350 will run for about 15 seconds and cuts off. willnot crank again until you pour gas into carb.


Here are some ideas for troubleshooting.
Do you have a mechanical fuel pump? If yes, crack the fitting on the fuel inlet to the carb to see if it's getting gas. What I normally do is to actually take the top off the float bowl to see what's going on inside the carb with the engine running. If you are not comfortable doing that, just check the pressure at the inlet. If pressure is not there, first change the fuel filter and if that doesn't work, change the pump. If the pressure is there, rebuild the carb or buy a rebuilt carb. If you have questions, please let me know.

If you have an electric fuel pump:
Does the relay click when you turn the key on? If not, first check the fuse. You can often learn a lot by interrogating the pump relay socket. To do that, please see my tip at http://www.fixya.com/cars/r6022358-relay_check. One way to check the whole circuit is to check the voltage at the fuel tank on the pink and black wires when the key is turned on. Note that the ECM will not leave the pump on until the car is running, but it should prime it when the key is first turned on. The other thing to check is the intertia switch--especially if the truck was involved in an accident before this issue came about. The circuit for the electric pump is shown below. Pleae let me know if you have questions.

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Nov 02, 2010 | 1986 Ford F 350

1 Answer

1988 chevy celebrity No fuel to the carberator.


without starting the engine position the key to the on position.
you can hear the fuel pump operationing for 4 to 6 seconds upon having the key on.
if not heard running check the fuel pump fuse, the fuel pump relay, and the engines oil pressure switch.
they all work the pump you see
the engine oil pressure switch runs the pump untill the engine reaches normal pressure
once the pressure is reached to the normal range the computer shuts that circuit off and turns the fuel pump relay on

May 22, 2010 | 1988 Chevrolet Celebrity

1 Answer

Will not start when hot. starter makes no different types of noise.


hello. perhaps I can assist you.

Perform this test:

Fuel pump test:

1. Get yourself a helper.

2. remove the gas cap.

3. have one person listen in the gas tank at the gas cap opening.

4. have the other person turn the ignition switch to the ON position ONLY so as the dash lights come on. Do NOT attempt to start the engine.

5. As soon as the ignition key is turned to the ON position, The person at the gas tank should hear the fuel pump run for TWO SECONDS and then it should STOP.

6. Does it ?.


If you do NOT hear it run, in most cases the fault is the fuel pump relay or the fuel pump..


As soon as you turn ON the ignition switch to start the engine a 2 second ONLY battery voltage signal is sent from the computer to the fuel pump relay and from the relay back to the fuel pump in the fuel tank. This runs the fuel pump for ONLY 2 seconds of which pressurizes the fuel system in preparation to start the engine.

Once the engine starts, The computer BYPASSES the fuel pump relay and sends constant contionous battery voltage from the computer to the oil pressure switch of which is now CLOSED because the oil pressure is UP because the engine is running. Therefore the battery voltage flows thru the oil pressure switch back to the fuel pump to run the fuel pump constantly until you turn OFF the engine.

Oct 01, 2009 | 2003 Cadillac CTS

1 Answer

Can not find the main relay switch on a 1985 Honda Accord (Carb)


the main relay, located at the back of the fuse box, is a coupler type which contains relays for the ECU power supply and fuel pump power supply.

Jul 16, 2009 | 1998 Honda Accord

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