fuel pump relay buzzing

Deputy99 · 08-01-2006, 01:35 AM

OK just rebiult my 88 non turbo supra. hooked everything back together and when i connect it to the battery i get a buzzing from my fuel pump relay. is it fucked or did i hook something up wrong

Deputy99 · 08-01-2006, 10:58 PM

Ok I got a new relay from the autowreckers and it does the same thing. anyone have any ideas?

Deputy99 · 08-13-2006, 08:31 PM

ok so i bought another relay and a resistor and i still get the buzzing when i connect the battery. Does anybody have any clue what so ever??? I am dying over here

i checked the resistance and it all checks out as per what the repair manual says. so it must be something else doing it?? i tried searching the forums and cant find any answers. I am on my knee's begging someone has to know the answer

thanks Jeff

Geebs · 06-19-2008, 11:29 PM

Hey, Did you ever get this figured out? Mine is doing the exact same thing. Please let me know!

Thanks!
Joel

CyFi6 · 06-20-2008, 02:20 AM

For some reason whenever i jumper the fuel pump in the diagnostic box, my relay buzzes, but when i run the car it does not. Im not sure why, but maybe it can help you figure out your problem.

suprabahamut · 06-24-2008, 01:40 PM

I have a 88 non turbo too, does yours crank up. Mine buzzes but cranks, as long as it cranks its is fine with me.

solomonsterous · 06-25-2008, 05:39 PM

I have the same problem with my 92 Supra Turbo.

Has anyone figured it out yet?

So far, I know the circuit containing the Fuel Pump Relay also contains the Circuit Opening Relay ( located on the passenger side kick panel ), and EFI Main Relay. One of the VSV below the intake may be related too.

3 things click simultaneously once, when I connect the battery then the Fuel Pump Relay buzzes.

abhattan · 06-27-2008, 02:58 AM

Usually that "buzzing" noise is the relay opening and closing extremely fast. That means that it is not getting the correct amount of voltage or current. It might be a little difficult, but check the voltage going into it on the coil part of the relay. If it's too low, that's your problem. But the car has to be running. I somewhat of a current draw in my car which is similar. My dome lights come on whenever it seems that the car has enough juice. The buzzer changes tones as the voltage increases as well. I probably have current draw somewhere, but it's not bothering me right now. Let me know what you come up with.

08-01-2006, 01:35 AM	#1
Deputy99 Stock Join Date: Jun 2006 Location: vernon bc Posts: 10	fuel pump relay buzzing OK just rebiult my 88 non turbo supra. hooked everything back together and when i connect it to the battery i get a buzzing from my fuel pump relay. is it fucked or did i hook something up wrong

06-27-2008, 02:58 AM	#8
abhattan 3" Exhaust Join Date: Oct 2006 Location: Brentwood, New York Posts: 162	Usually that "buzzing" noise is the relay opening and closing extremely fast. That means that it is not getting the correct amount of voltage or current. It might be a little difficult, but check the voltage going into it on the coil part of the relay. If it's too low, that's your problem. But the car has to be running. I somewhat of a current draw in my car which is similar. My dome lights come on whenever it seems that the car has enough juice. The buzzer changes tones as the voltage increases as well. I probably have current draw somewhere, but it's not bothering me right now. Let me know what you come up with. __________________ '91 Turbo Targa 5 Spd. '87 Corolla GT-S 5 Spd '91 Accord Daily Driver 5 Spd Soon to be rebuilt (All to some extent)

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08-01-2006, 10:58 PM	#2
Deputy99 Stock Join Date: Jun 2006 Location: vernon bc Posts: 10	Ok I got a new relay from the autowreckers and it does the same thing. anyone have any ideas?

08-13-2006, 08:31 PM	#3
Deputy99 Stock Join Date: Jun 2006 Location: vernon bc Posts: 10	ok so i bought another relay and a resistor and i still get the buzzing when i connect the battery. Does anybody have any clue what so ever??? I am dying over here i checked the resistance and it all checks out as per what the repair manual says. so it must be something else doing it?? i tried searching the forums and cant find any answers. I am on my knee's begging someone has to know the answer thanks Jeff

06-19-2008, 11:29 PM	#4
Geebs Stock Join Date: Jun 2008 Location: Oklahoma Posts: 1	Hey, Did you ever get this figured out? Mine is doing the exact same thing. Please let me know! Thanks! Joel

06-20-2008, 02:20 AM	#5
CyFi6 3" Exhaust Join Date: Oct 2007 Location: SLO Posts: 234	For some reason whenever i jumper the fuel pump in the diagnostic box, my relay buzzes, but when i run the car it does not. Im not sure why, but maybe it can help you figure out your problem.

06-24-2008, 01:40 PM	#6
suprabahamut 3" Exhaust Join Date: May 2007 Location: greensboro Posts: 242	I have a 88 non turbo too, does yours crank up. Mine buzzes but cranks, as long as it cranks its is fine with me.

06-25-2008, 05:39 PM	#7
solomonsterous Stock Join Date: Jun 2008 Location: Canada Posts: 1	I have the same problem with my 92 Supra Turbo. Has anyone figured it out yet? So far, I know the circuit containing the Fuel Pump Relay also contains the Circuit Opening Relay ( located on the passenger side kick panel ), and EFI Main Relay. One of the VSV below the intake may be related too. 3 things click simultaneously once, when I connect the battery then the Fuel Pump Relay buzzes.