fuel pump question?

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Apr 17, 2008 | 05:10 PM

mean94lt1

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From: READING Pa

fuel pump question?

ok i recently put in a walboro 255 any had good fuel pressure now i only have 30 pounds and when i rev it it drops to like 15-20 i blocked off the return line and it doesnt go up stays at 30 and pulling the vaccum line off doesnt change it either i have a aeromiotive fp reg on it and when you adjust the fuel pressure it doesnt change either i believe its the pump anyone have any ideas on what it is?

Apr 17, 2008 | 05:13 PM

the_merv

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From: The Beach...

The Feed Line in the back could be leaking internally, or could be coming off..

Apr 18, 2008 | 10:43 AM

mean94lt1

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From: READING Pa

in the tank?

Apr 18, 2008 | 10:49 AM

Nostang

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From: Gilbert, AZ

Yup, in the tank. the merv is right.

Apr 18, 2008 | 10:50 AM

mean94lt1

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From: READING Pa

is that the plastic line that clips on to the pump and the top of the sender?

Apr 18, 2008 | 11:21 AM

Nostang

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From: Gilbert, AZ

It is probably the line that goes from the fuel pump itself to the top part of the sending unit. Mine blew partially off before and the fuel pressure did the same thing.

Apr 18, 2008 | 01:56 PM

the_merv

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From: The Beach...

This is a pic of what is inside of the Tank..

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Apr 18, 2008 | 03:37 PM

the_merv

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From: The Beach...

I have never had that problem.. probably a Hose Clamp.

Apr 18, 2008 | 05:40 PM

#10

mean94lt1

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From: READING Pa

mine has a clear plastic line on it it looks like flex tubeand it clips on at the sending unit?..i dont have rubber hose?....yous dont think it could be the fuel pressure regulator do you?

Apr 18, 2008 | 05:56 PM

#11

mean94lt1

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From: READING Pa

the pump sounds strong when you turn the key to prime it but if you turn they key and go out to look at the fuel pressure guage its at 0

Apr 18, 2008 | 06:45 PM

#12

the_merv

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From: The Beach...

Quote:

Originally Posted by mean94lt1

mine has a clear plastic line on it it looks like flex tubeand it clips on at the sending unit?..i dont have rubber hose?....yous dont think it could be the fuel pressure regulator do you?

Mine is aftermarket.. I kinda modified it too.

A Gauge will read 0 if the Car isn't running..

Apr 18, 2008 | 10:24 PM

#13

mean94lt1

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From: READING Pa

if the fuel pump is primed and the car isnt running it should be showing some kind of fuel pressure right?...it was down to like 20 pounds today

Apr 19, 2008 | 03:42 AM

#14

crazyhorses

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From: ...outside the matrix...

I think I remember reading that the walboro doesn't have a check valve, and that would not allow pressure to hold like a stock pump.

Apr 19, 2008 | 11:25 AM

#15

mean94lt1

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From: READING Pa

ok that would make sense but i guess the fuel pump is taking a **** then thats why the pressure keeps getting lower?

Apr 19, 2008 | 07:05 PM

#16

mean94lt1

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From: READING Pa

anyone?changed the fuel filter it was pretty dirty but didnt make a difference

Apr 19, 2008 | 08:25 PM

#17

mean94lt1

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From: READING Pa

ok i got it out but i dont see any problems unless its the feed line cause it sems kinda loose where it goes onto the pump im going to just order a new pump and see how it goes

Apr 20, 2008 | 03:45 AM

#18

the_merv

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From: The Beach...

Quote:

Originally Posted by crazyhorses

I think I remember reading that the walboro doesn't have a check valve, and that would not allow pressure to hold like a stock pump.

This might possbily be the answer bro..

Apr 20, 2008 | 12:50 PM

#19

BALLSS

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Aeromotive FP regulator?????

Does not adjust FP???

My $.02 is the aeromotive POS......unless you have the only one that does work.

Apr 20, 2008 | 01:19 PM

#20

mean94lt1

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From: READING Pa

well im putting a new pump in and if that doesnt work guess ill do the fp reg i didnt know anyone had problems with the aeromotives thats whats on the car now?....but i went through the steps to check the reg i blocked off the return line to the tank after the reg and the pressure didnt go up it stayed the same and if thgats the case it says about a faulty pump i bought the pump used so that might have been the problem

Last edited by mean94lt1; Apr 20, 2008 at 01:29 PM.

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