More Walbro Problems

[Four-Four-Two]

I finally figured out why my car wouldn't run. I dropped the tank last night, and saw that the pump had slid down a 1/4 of an inch, so the pump was pumping, but it was spitting the fuel right back in the tank. I put my old pump back in the car so I could drive it, because I need the car.
The problems is, the Walbro pump is about a 1/4" shorter than the factory pump, so it doesn't fit in snuggly between the sending unit, and the bottom piece that holds it in. The unit slides up and down slightly on the solid tube that goes through the sending unit into the hose.
Has anybody else run into this problem? I was thinking about sticking something between the bottom of the pump, and the part that holds it up, but I don't want anything to come loose. Any ideas on what I can do?

 

[Steve Wood]

Assuming you replaced the original pulsator with the piece of hose supplied, the hose should be of such length that the pump is in the right place. If the hose is clamped tightly on the pump end and on the hanger end, nothing should be able to slide anyway.

 

[Four-Four-Two]

Steve-
I just did a search on the subject before you posted and saw that people recommended bypassing the pulsator and using the hose supplied. I had no clue you were supposed to do that, we just followed the directions.
Is this the way to go?
Do you remove the pulsator all together? I assume you cut the rubber tube to fit in where the pulsator went.
Am I on the right track?

 

[turbolimited]

Throw the pulsator in the trash! Just cut the rubber hose to length so the pump sits down in the same spot, and you'll be good to go. HTH!

 

[1badTTA]

Just wondering, When I changed my stocker to a W340, I reused the pulsator, didn't notice the piece of hose till I had the tank back in. Other than the fack that the pulsator could slip off, what are the benifits of using the hose? If you have ever droped the tank in a 3rdgen Fbody, you understand why I don't want to go back and change to the hose.

 

[timothydog]

The hose makes your pump noisy.
My pump has a good "whine" to it when the fuel level get's down.

 

[Steve Wood]

Don't know who is selling pumps without a note to chuck the pulsator but they need to stop doing it. Several people have had the same problem. The pulsator dampens the noise a bit. The noise is not very obvious and I don't normally hear it inside the car.

You should also open up the end of the pipe from the hanger that the hose slips over. If you look at it, you will see that it ihas a small lip on it that restricts flow...open it up.

 

[Four-Four-Two]

Got mine from PTE. I can't say for certian it didn't come with a note, but I really don't remember one.

Once again, thanks for the help guys.

 

[striker_29]

I got mine from PTE to and I dont remember a note either. I think this may explain a few of my problems

 

[GotGrunt]

I got mine from Jay's GN and I called him up and he gave me step by step instructions... I don't think it said to toss the pulsator in the instructions provided but the hose was included so it made me kinda confused.

 

[grey1]

I got my 340 from Racetronix and the pulsator wouldn't fit right, so I used the new hose supplied. No Problem.

 

[gofstbuick]

Didn't buy a walbro, but bought a kenne bell (didn't know about walbro until I started surfing this site). The instructions said to use the hose supplied and discard the pulse damper. I called them to make sure and KB confirmed the instructions. The FP noise is really not that noticible, until the fuel level is low or I'm standing in back by the tank.

 

[Racetronix]

The Racetronix ad and web based instructions show the pulsator removed. If the pulsator was to be kept, there would be no reason to have the supplied hose and gear clamps.

http://www.racetronix.com/images/Fuel_Pumps/pump_assembly.jpg

http://www.racetronix.com/Manuals/RX-G7-FPWH/RX-G7-FPWK.html

Cutting the tapered portion of the inlet hose is recommended but optional.

The instructions included with the Walbro 400-835 installation kit are generic. The Walbro pumps that use the 400-835 kit are used in a wide variety of vehicles.

The pulsator’s primary function is not to reduce pump whine. The factory foam sleeve and the Walbro rubber bumper are designed to reduce the transmission of pump noise. The most significant contributing factor to the transmission of pump noise outside the tank is how firmly it is in contact with the inner skin.

Jack
Racetronix