It's been pretty quiet around here lately. Has anybody got the Walbro pump working corectly on a 2nd gen yet? Last I heard they were having problems regulating them, were going to get bigger reg, then thread got locked. I seriously want to know. I believe i found a regulator that will get the job done Mallory Summit part #MAA-4307 3 port 4-25psi return style. Please keep it a civil like thread. What did you guys get working?

Jed

 

I,ve been running the Walbro pump for about a month.
17 psi idle, 13 psi WOT,

 

How'd you set it up? Got any pics?

 

There is another thread about Walbro also.

https://www.dieseltruckresource.com/...ad.php?t=91883

 

No pics yet.
I installed the pump in the supply line and mounted it to the frame.Then I disconnected the supply line from the stock LP and connected it to the filter housing. Next I put a tee fitting in the line from the filter to the IP and another tee in the plastic return line (the plastic line runs from the motor to the 1/4" steel line on the frame) and ran a 5/16 line from tee to tee.Thats the bypass.

I used the stock LP wiring to trigger a relay to run the Walbro pump.
Now, I have stock fuel lines, the restriction of the 1/4 return line is giving me the psi at the IP I have. 14-15 cruising.

With my truck and my mods I cannot pull the pressure lower than 12 psi WOT pulling any weight.

Time will tell maybe it will work maybe not. I've got $150 invested.

 

I always read about relays being used to trigger the aftermarket lift pump, but, being electically inept , I wouldn't know how to lay-out/purchase parts for a relay system. Is it easy to explain?

 

I went to the auto supply store and asked for a lighting relay, 30 or 40 amp will do.
Heres the pin numbers and what they do.

30 is the common or input voltage (or ground) to be switched.
87a is the normally closed connection (can be used as a switched voltage output when the relay is at rest). (This terminal offers no voltage when the relay is energized.)
87 is the normally open connection (switched voltage output when the relay is energized).
85 is connected to the ground of the triggering voltage.
86 is connected to the positive 12V of the triggering voltage.

I ran 14 gauge wire from the battery to a 15amp fuse than to pin 30 on the relay. From pin 87 to the Walbro pump positive +. Then the two wires from the stock LP to pins 85 & 86. HTH

 

Just curious, whereabouts on the frame rail did you mount your Walbro? Looking at your pressure readings, I'd like to try to duplicate the position to get as close to it as possible. Also, did you do your tee at the VP inlet, right at the inlet, or some distance away? How about the return line tee? is it close to the VP or farther away? Like I said, your readings are perfect and I'd like to get this down so that it's as close to those as possible. Thanks for any input.

 

Follow the line from the stock LP back, the line goes from plastic to metal. I went back about 6 inches on the metal line and cut it there and installed the pump. Disconnect the banjo from the stock LP and move it to the filter housing. The lenght of the pump will give the added slack.

The VP inlet tee is at the rubber hose connecting the filter to the VP.

The return tee is in the plastic line between the motor and the frame. You might want to replace this line with 5/16 rubber. The plastic is tough to get a tee in. HTH

 

Walbros have now been installed on 7 trucks that I am aware of.

More installations are occurring every week.

All owners seem to be satisfied with the pump's performance. We've had zero pump failures and all installation attempts appear to be successful. (Nobody has tried to install one and been unsuccessful.)

A typical installation is resulting in 70 GPH of clean fuel actually going past the inlet of the injection pump at suitable pressures.

That is all I can say on this site.

 

Mine is running fine... I have a 3rdGen. Not much of a difference in the setup.

 

Time will tell on how reliable the Walbro ultimately turns out to be, but with a superior pump design, it should do better than what we've been seeing.

 

You truly are a piece of work. You have been told repeatedly that you can post here as long as you don't start that argument crud with everybody who thinks something different than you. (like you were doing before)

You can whine as long as you want but repeating a lie over and over again, doesn't make it true. You tried to argue with EVERY single person that posted anything that was different than your claims, and everybody here saw it.

That is what you were asked to stop doing and instead YOU got mad and decided to take your ball elsewhere to play. All of those threads still exist and you were warned multiple times to knock it off.

This "I can't post here stuff" is weak and far beneath you, and you need to get over it while you still have posting abilities and or any credibility here.

These guys are not stupid, they can do a search on your threads and see the truth for themselves. They don't have to take anyones word for it, it is public knowledge and easily accessed.

 

Just curious, and for the guys that have the Walbro installed and running, how does it do at startup?? Any differences at a cold start? That's about the only part of the Walbro setup that is a concern for me and it's only because the stock lift pump has 2 speeds and one is half-speed for start-up purposes.

 

It doesn't have two speeds, it just gets pulsed. I'm running a Holley Blue off a dual 30 amp relay (left over from my PE pump days) that's triggered off of the stock lift pump wire. When I turn the key to on it pulses the pump to prime the system like the stock one and then shuts off during cranking. Once it's cranked it runs at full speed.