is the walbro always got a constant pretty noisy hum to it? for the 1st time in 2 years i removed my backseat and pulled it out to inspect it. i put it back in and went for a test drive without the back seat cushion on...and that pump was just humming. does the backseat cushion deaden the noise so much that this is normal?

thank you

95 GS Boosted

I contributed to the Wiki!
EVO IX - just a really expensive boost gauge and a K&N air filter
96 Eclipse RS -awaiting registration and inspection
95 Eclipse GS - parts car
Mods/Profile - http://www.2gnt.com/index.php?d=cs82685

---

2012 2500HD LML

during the summer, you'll realize that it's louder than the winter. Gas temp effects the sound, don't know why.

___________________________________________



http://www.2gnt.com/quote_db.php?id=278

Outside of Corona: "That sucks, peace out..." (jamie walks away)... "Sweeet, what we doin?" -Zac
Tim's garage (prior to motor install): "Im gonna smoke real quick, that way if you fuck up I am already nicotined up" -Tim

Yeah Walbro's are loud. I've heard that doing the pump rewire helps quiet them a bit. Covering the access plate with dynamat or something similar helps too.

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

Yep. Someone wrote something about an even higher flow fuel pump from a TT supra being quiet. Not sure about it's capabilities, but Walbros aren't from what I've heard the most reliable pumps out there.

I'm broke, it's broken. I'm broke because it's broken. It's broken because I'm broke.

Simplicity Car Club - Founding Member

You think that one walbro is loud?

Run one of these,

http://www.fullblownmotorsports.net/product_info.php/cPath/21_23_69/products_id/39?osCsid=6ebebb024d2dfd10f2bd1bab16ec41b2

---

2012 2500HD LML

alright thanks guys.

95 GS Boosted

Originally posted by CODE4
You think that one walbro is loud? Run one of these, http://www.fullblownmotorsports.net/product_info.php/cPath/21_23_69/products_id/39?osCsid=6ebebb024d2dfd10f2bd1bab16ec41b2

Captain Caveman

96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq
97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq
98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats
99 OZ 5sp Stocker 15.856 @ 85.97
99 GS stocker auto 17.7@77mph!

wiki home page:http://www.2gnt.com/index.php?d=bullettdsm

I knew they were 4g, but had no idea they were awd..... :o

I'm broke, it's broken. I'm broke because it's broken. It's broken because I'm broke.

Simplicity Car Club - Founding Member

Captain Caveman

96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq
97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq
98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats
99 OZ 5sp Stocker 15.856 @ 85.97
99 GS stocker auto 17.7@77mph!

wiki home page:http://www.2gnt.com/index.php?d=bullettdsm

---

2012 2500HD LML

My old 5.9l cummins had enough fuel to pretty much hydrolock a 420a. Just run that setup. Sigma injection pump, lift pump, and in tank pump. Should put you at enough fuel pressure to split the stock rail.

I'm broke, it's broken. I'm broke because it's broken. It's broken because I'm broke.

Simplicity Car Club - Founding Member

I know this thread is old, but I wanted to bring it back due to an experience I had today. Bear with me here..

I have been running the same walbro 255 high flow pump since 2003. (yea, it's old) and I have always noticed that it has an audible humm at idle. As per the above, nothing to worry about there. Recently, however, I noticed that sometimes at cold startup the humm would not be constant like it always used to be. It would vary slightly and the tone would change. This never lasted long, and didn't happen all the time, so I didn't concern myself with it.

I just got done doing a 500 mile break in on my new clutch, so today was the first day I got on the car in a while. When I was at WOT, as boost would build, the pump would get louder, and I mean real loud! At full boost the thing was screaming and sounded like it was going to explode. As soon as I let off and fuel pressure dropped, it sounded normal.

My question is, do you think this is a sign that the pump is getting ready to fail, or that it was just for some reason pumping at an insanely high fuel pressure and I need to retune my system? As the car did not lean out (narrowband was all the way rich at WOT) and the car did not feel like it was starved for fuel, I am considering leaving it alone and just waiting things out. At the same time, I am thinking it may be smarter to preemptively buy a new pump.

Anyone have a similar experience? Thoughts??

1999 Eclipse GS
Built motor
Hahn 16G Turbo w/ FMIC
Hahn Stage 5 Portfueler (270's & 500's)
Zeitronix Zt-2 wideband w/ 3.5bar MAP
3" SS Turbo Back
CM Stage 4 Clutch and Fidanza Flywheel
Baer Big Brake Kit

keep an eye out for a GSS342 wally. if you find a good deal on one, do it. if the sound becomes unbearable, just buy one. don't stress over it though. that would be annoying lol

___________________________________________



http://www.2gnt.com/quote_db.php?id=278

Outside of Corona: "That sucks, peace out..." (jamie walks away)... "Sweeet, what we doin?" -Zac
Tim's garage (prior to motor install): "Im gonna smoke real quick, that way if you fuck up I am already nicotined up" -Tim

It is up to you - I cannot say personally how long to expect a Walbro to last you. For $100 or so I would buy a new one to have on hand. Additionally since you are boosted I would run a fuel pressure gauge to keep an eye on things.

Perhaps a bit on the cautious side, but when running under a 1/4 tank and boosting I keep an eye on the fuel pressure gauge in the event of a flicker.

---

2012 2500HD LML

I don't currently have a fuel pressure gauge, but I am cautious like you Dave, and I don't even try to boost the car when I am under 1/4 tank.

I think I will pull the pump just to ensure the filter is not clogged. If it looks good, I will reinstall it, go for a pull, and see how it sounds. If it still whines, I think I may just buy a new one. I have seen them for as low as $73 on ebay.