Fuel pump?

[jkbmkiii]

Hey guys here is a question for you! About a week ago my fuel pump started making a pulsing sound, I had a extra fuel pump so yesterday I put the other fuel pump in the car. To my surprize when I started the car the problem still is there? Any help any body?

 

[GrimJack]

My guess would be power - either just the power to the pump, or perhaps the relay that switches voltage is fubar'd and sending pulses of each voltage instead of a constant power...

 

[shaeff]

try this:

cut the connector off the chassis side of the fuel pump, and connect a relay there. then cut off the fuel pump side, and strip the wires. run a 10 guage FUSED wire from the battery to the relay, (this will drive the pump) and ground the other Negative side of the pump to the chassis.

i did this with my walbro, and that thing is LOUD. you can hear it working both in and out of the car.

-shaeff

 

[mcpcola]

i have a walbro 255 and mine is almost silent

 

[lagged]

my walbro is pretty loud compared to the stock pump, which you cant really hear.

 

[boost fiend]

ive got 12 volts to my walbro and omg is it louder than hell!!!!!!:icon_evil

 

[IHI-RHC7]

Is the noise comming from the pump itself? Is there gas in the tank?

 

[jkbmkiii]

YA there is fuel in tank , and the car runs great but with that pulsing sound something has got to be wrong. Fuel press regulator? Yes the noise is from the pump!

 

[IHI-RHC7]

Unbolt the fuel pulsation damper on the back of the fuel rail, put the hardline in a hose running to a bucket, and short terminals Fp and B+ on the check connector. This should turn the pump on with no pressure, filling the bucket pretty quick. If it's quiet then, you have a return issue, if it's still loud, you probably have a pinched or clogged send line under the chassis.
-Jake

 

[jkbmkiii]

Is this something that could just pop up over night?

 

[IHI-RHC7]

If you pumped up some garbage through your pump, and somehow through your filter, yes.
I'd try blowing compressed air through the hard lines to try and clean them up if it's still noisy just spewing into a bucket.

 

[jkbmkiii]

I have not had my char/can in the car for a couple of weeks could that cause it?

 

[IHI-RHC7]

I think no, did you vent your cas cap?

 

[jkbmkiii]

Ill go start working on car and get back to you thanks!

 

[IJ.]

Unbolt the fuel pulsation damper on the back of the fuel rail, put the hardline in a hose running to a bucket, and short terminals Fp and B+ on the check connector. This should turn the pump on with no pressure, filling the bucket pretty quick. If it's quiet then, you have a return issue, if it's still loud, you probably have a pinched or clogged send line under the chassis.
-Jake

:withstupi (sorry there isn't an "I'm with Jake")

 

[IHI-RHC7]

Heh, it's all in the troubleshooting.
stupid.

 

[jkbmkiii]

I drove the car today and my computer is pulling timing hard so its back to the drawing board!

 

[88targarose]

i have a walbro 255 and mine is almost silent

My intank walbro 255 is almost silent as well, I listened when I started my car to see if I could hear the difference and I couldn't.

 

[shaeff]

i'll say it again: crappy stock wiring! wire it up to a relay! it took me an hour, TOTAL, including hiding the wire 100%.

-shaeff

 

[antman]

my 255 isn't that loud until u run it low on gas. thats when it gets loud and kinda pulses.