Walbro Pump

[Lightman]

I installed the regulator approx. 19" past the discharge side of the pump. As I understand it, a regulator lets a set amount of pressure through & a bypass valve basically does the same. These Walbro pumps put out somewhere around 130 psi so weather it be a bypass valve or regulator there is always going to be fuel flowing through either the regulator or bypass valve to keep a constant 16 psi or whatever the regulator or bypass is set at I would think. Am I missing something?

I know others are saying it can't be pulled below 13 psi so I believe I'm not getting something.

Ideas? Both the regulator & bypass valve systems flow the excessive pressure (fuel) back to the tank.





Are you using a straight through pressure regulator that does not have a return to the tank? If so then your walbro is running at full pressure all the time. It does not have a pressure releve built in it requires a return type regulator if you put a pressure gauge on the line comming out of the pump before the regulator you could see up to 130psi and you are working your pump at full load all the time. the Walbro is a fuel injection supply pump and needs a by pass to work right. I hope this is as clear as mud

 

[klaybus]

Got it figured out. I'm replacing the bypass regulator I've got installed. I need one that is springed so that when the Injection Pump needs more fuel it has what it needs vs the way my regulator just allows a pre set amount of fuel through it to achieve the desired 16 psi at idle. Clear as mud?



Clay

 

[lmills]

Sure is... . Sounds like the one you have now is rated at flow, not so much as pressure

 

[DavidC]

Good job Clay. I knew you would get it figured out.



Dave

 

[Bob Cochran]

If you have ever doubted the effect of changing voltage on the fuel pressures delivered by the LP. Just watch the pressure drop every time the intake heaters cycle in the winter. Or is my truck the only one that does that?

 

[radar doctor]

I'd sure like to put a Walbro in paraellel with my orignal unit, in my 03 auto... Where would be a good place to install it? Could a toggle switch be used to switch between the units? also could the orignal Fuel Filter be left installed and used. . ??? What would be a close total Cost for this action???? Thanks Doc:::::

 

[lmills]

I'd sure like to put a Walbro in paraellel with my orignal unit, in my 03 auto... Where would be a good place to install it? Could a toggle switch be used to switch between the units? also could the orignal Fuel Filter be left installed and used. . ??? What would be a close total Cost for this action???? Thanks Doc:::::

I doubt you could run them parallel on an 03 since the lift pump is on the filter housing.

 

[Rams-n-Hogs]

I'd sure like to put a Walbro in paraellel with my orignal unit, in my 03 auto... Where would be a good place to install it? Could a toggle switch be used to switch between the units? also could the orignal Fuel Filter be left installed and used. . ??? What would be a close total Cost for this action???? Thanks Doc:::::

When I installed mine, that's what I originally wanted to do. I never came up with a good solution, since I wanted to use the factory power connector on the walbro, to make the cool down timer work properly. I ended up getting the harness and fuel filter adaptor from Glacier Diesel, and just wiring in the Walbro, down on the frame. I used an Aeromotive regulator, that I already had, and bolted it to one of the bottom bolt-holes from the factory lift pump. If the walbro dies, all I have to do is pull the adaptor and regulator off the fuel filter housing, put the stock lift pump back on, and run a bypass line around the walbro, (as a temp fix), until a get a new walbro. Should only take about 1/2 hour to change. I personally think the walbro will last a long time, though. While I was in there, I fabricated a couple of brackets out of 1" angle iron, and 1" flat stock for the Perma-cool filter head between the stock fuel filter housing, and the CP3. I have the apps mounted on the engine, so that got interesting. The filter hangs from the intake horn. I now have the stock filter, and 2-micron filtration. By the way, the 2 micron Fleetguard filters from Glacier Diesel, (FF5320), will fit the Perma-cool filter head.

 

[radar doctor]

thank you guy's I was hoping that this could be done easier . i am not aware of the problems under the truck. i would have to have it done by a mechanic or another TDR member. . i wanted a system where by if the new unit went out that i could just Close a Toggle Switch and be back in business... . Out here if you loose a LP your hitchhiking ha

 

[klaybus]

Yee Ha!

I got my bypass installed & what a friggin difference! I bit the bullet & ordered one from Rich at Glacier & all pressure dropping problems are solved. I'm at a rock hard 16 psi at idle & can't pull it down to lower that 13-14 under WOT. With our #8500 5vr in tow it stays at 16 psi as well. When taking off with the 5vr from a stop I can briefly pull it down & then it shoots right back up to 16 psi.....

As many others have stated this is a great little pump & super QUIET! You really have to listen to even hear it run. Now, LONGEVITY is the key. Time will tell but it sure looks promising!



Clay :-laf

 

[lmills]

got about 10K on mine so far and lovin it.

 

[Luken]

7,000 miles on mine so far... 42psi idle - 40psi WOT. Awesome kit.

 

[klaybus]

Damn! I thought I had my LP problems cured... . NOT!

Well, it's been 2 years & I believe I've experienced my 1st Walbro failure. I'm gonna go ahead & order two of them from Richard as I still think it's a better pump than the OEM Carter POS & I'm not driving my truck near as much since getting a company vehicle to commute back & forth to work in. All said & done I would like to go to a mech pump system or even a new cam & go with the 12 valve mech pump but now is NOT the time. Maybe this summer when I've got a little more disposable income to blow!



Clay

 

[DavidC]

Maybe this summer when I've got a little more disposable income to blow!



Clay

Let me know when that is Clay. Make your self a note that I am first in line:-laf. Sorry to hear of the Walbro.



Dave

 

[DAAguiar]

I have 60,000 plus on the Walbro from GDP. At 15,000 on pump pressure was erratic . I thought it was the pump, turned out to be bad contacts on Dodge fuel pump relay, in PDS under hood. Installed my own relay and a toggle switch under hood to help with fuel filter changes. Dodge system only turns on my relay, 12 volts to Walbro, direct from battery. At 45,000 pump was making noise and pressure was low, turned out I had a broken hose clamp on the intake side of pump. This pump is strong on the suction side and will suck air if connection is not right. Note this problem would change with outside temp. . leak air at hose connection when in the 30 s and work great when temp in 60 s. This is a very good pump. . if I had done a proper install the first time there would have been no problems.

 

[klaybus]

This is a very good pump. . if I had done a proper install the first time there would have been no problems.

I'm not saying it's not a decent pump. Hell I've gotten (2) years outta mine but it's still NOT all that & a bag of chips. It's a friggin electric pump & like an auto transmission it's NOT a matter of IF it will fail, it's WHEN.

That being said, I've still been damn happy with the performance of my Walbro. Richard at Glacier Diesel has always been GREAT to worth with. I just ordered (2) of them so I can replace my dead Walbro & have a backup.



Clay