Internal lift pump on my 1HD-FT took a dump (5 Viewers)

[PlantDriver]

Wondering if anyone knows if I can rely on a 12V lift pump only. I have the Walbro FRB-5 12V helper pump that many people use on the 1HD-FT and other Toyota diesels, and the truck runs fine with just it, but will not even idle without the Walbro energized. I know that the problem is not a restriction anywhere - the engine won't idle with a hose stuck in a jug of diesel (hose to new and primed fuel filter to IP) unless the jug is higher than the engine (or unless the Walbro's running.) I'd love to get the IP rebuilt (or just replace the internal lift pump, if it's replaceable) but I'm about to leave for a 1500 mile trip, mostly off-road, and don't have much time (nor do I want to break down in Canyonlands -)

Any advice would be much appreciated.

 

[canucksafari]

It would probably work if the Walbro is meeting the IP's needs on the highway. However, taking off on a 1500 mile backroad trip, I'd prefer to have a working lift pump in there. At the very least, I'd take another spare Walbro along.

 

[Radd Cruisers]

It would probably work if the Walbro is meeting the IP's needs on the highway. However, taking off on a 1500 mile backroad trip, I'd prefer to have a working lift pump in there. At the very least, I'd take another spare Walbro along.

I would fix the lift pump and run the 12volt unit with it. If you ever get stranded at least you have the mechanical unit to get you home...

 

[PlantDriver]

Dead lift pump

Thanks to both of you - and I'd emailed G&S Cruisers this evening, and Greg replied (thanks, Greg!) with the same opinion - as did my buddy Brian - Gifu on the forum, who has the same engine: get the IP rebuilt.

So, that's what I'm going to do, but it's not going to happen before the upcoming Carbon Neutral Expedition, so I'll miss that. Next year!

Thanks again to both of you!

 

[rick_d]

I would suggest Redding Fuel Injection for the rebuild. Good guys/gal. They have done several pumps, injectors, and turbos at a good cost.

 

[PlantDriver]

Redding Fuel Injection

Thanks, Rick, I'm going to call them, and I'll report what they say about cost to rebuild, and whether or not they think I can run with just the Walbro, and - if they say I can - for how long.

Thanks again - and thanks to Greg and Sheldon at G&S Cruisers for their many emails on the subject!

 

[mudstorm]

Lift pump

i have a 1hd-ft cruiser
i just got my fuel pump rebuilt to try and fix my car stalling on angles
it didnt fix the problem so i run a facet red fuel pump

food for thought 1hd-ft is very similar to 1hd-fte in 100 series

100 series runs 12mm fuel lines
80 series joins 10mm fuel lines
toyota knew there where problems...

 

[phatman81]

I'm looking at a High Flow Lift Pump because of its superior Water / Diesel Separation to use on my 1995 1HD-FT .. This FASS Lift Pump is made for 100gpm and what I would like to know is what the Lift Pumps your running Gpm is .. It will take some doing but I can put a bypass and push some diesel back to the tank so I won't have an over pressure issue .. Its all about having the right pressure and fuel flow which should be that big of an issue given the fact that one can dial something like this in .. I think this Lift Pump would sell itself If I created a nipple kit that would work with Toyota 4.2L diesels .. Any thoughts ? ..

So I have figured out how to implement one of these Bad Boy Air / Water separation filters ! .. DON"T put this thing inline with your fuel line .. Just leave your fuel line alone ! .. What you need to do to implement one of these is a modification to your fuel tank .. You will need a connection into the Lift Pump directly from the tank and a welded in tube that aims the to "fuel to engine" to a welded in tube that pushes fuel directly at the tank fuel pickup that goes to the fuel pump inside the tank .. In this way clean diesel is aimed at the pickup and we don't have over pressure / flow going to the fuel pump .. This method will work with any diesel fuel system and keep your tank free of water and air mixed into the diesel ..

When your off road and bumping around foam forms on the top of your diesel fuel .. Foam / air mixes into the fuel and your engine efficiency decreases significantly .. The reason for this is when air gets pushed in with the fuel it can act like a blow torch and burn the tips of your injectors which effects life and overall efficiency ..

I know this is the wrong thread buy Fuel / Oil all need 3-5 micron filtering .. Soot in the oil effects engine life as soot is abrasive .. That is why I plan to put an Amsoil bypass filter in as well ..

 

[phatman81]

I have been speaking with one of the FASS Lift Pump / Air / Water filtration system .. I was concerned that the 8-10 psi from the Lift Pump which is a FASS TS C10 100G which is for a 2001-2010 Duramax .. I was concerned with the excess pressure and flow rate 100 Gpm and I think I now have a GOLD PLATED SOLUTION ! ..

I plan to use a 4.5-10 psi Holly Fuel Regulator / Bypass and route the excess fuel back to the tank .. Continuously cleaning the fuel in the tank .. This has two functions .. 1st I don't want to over pressure my 80 series fuel pump .. The flow rate of the FASS TS C10 100G Lift pump is 100gph that is far to much for the 4.2 1HD-FT engine .. 2nd By sending back the excess filtered fuel back to the tank near the fuel pickup I will be sending clean fuel back to be mixed with that which is in the tank to be filtered again and this will ensure that the back pressure on the Lift Pump Motor doesn't overwork the motor and shorten its life .. A cool motor is a happy motor ..

I plan to put the Fass Lift Pump under the hood for easy access with this Fuel pressure regulator / bypass valve ..

 

[roscoFJ73]

Landcruisers work fine on their standard fuel delivery. The stock system draws as much as 4 times what the engine needs and sends it back to the tank.. You are trying to solve a problem that doesnt exist.

 

[phatman81]

Landcruisers work fine on their standard fuel delivery. The stock system draws as much as 4 times what the engine needs and sends it back to the tank.. You are trying to solve a problem that doesnt exist.

Air / Water in the fuel is a problem that does exist .. The more the fuel becomes jostled in the tank the more foam and air form in the fuel here is a video .. LINK .. BTW, what is the flow rate of the current fuel pump in a Land Cruiser 80 ? ..

Looking at the Walbro FRB-5 Lift Pump it furnishes 8-11 psi and 45 gpm .. So it looks like a fuel regulator / return is not needed after all with the FASS Lift Pump I identified above ..

Who is Morant ? .. Is he one of those Branch Covidians spreading the Covid Virus on Paper Money .. Like to bag one of those out in the wild mate ..

 

[rick_d]

First, i withdraw my support for redding fuel since my endorsement in this 2010 thread

second, i agree with rosco and you are solving a non issue.

 

[phatman81]

First, i withdraw my support for redding fuel since my endorsement in this 2010 thread

second, i agree with rosco and you are solving a non issue.

LINK AIR IN THE FUEL please click on the link .. The number one cause of injector degradation and failure is air in the fuel .. Milwaukee School of Engineering claim that 75% of hydraulic system failures are caused by contaminates in fuel / fluid ..

 

[roscoFJ73]

Air / Water in the fuel is a problem that does exist .. The more the fuel becomes jostled in the tank the more foam and air form in the fuel here is a video .. LINK .. BTW, what is the flow rate of the current fuel pump in a Land Cruiser 80 ?

Ive seen that video and its a load of crap. The fuel in an off-road vehicle is always being shook up and its never been a problem before. By the time the fuel goes through the fuel lines back to fuel filters and injection pump, the bubbles have disappeared.
In fact, with the fuel pick up at the bottom, all the bubbles would be on top. So what goes up the pick up would be bubble free IMO
You can collect a clear hose between filter and inj pump and see there are no bubbles for yourself. These guys are selling snake oil to those who don't know much about diesel fuel systems.
Water also sits on the bottom and water separators or warning sensors deal with this. But I have never had an alarm go off and only ever found a few drops of water in a separator.
The maximum amount a Toyota lift pump can pump is 54 litres an hour, although the manual expresses it as 900 cc a minute

 

[roscoFJ73]

Milwaukee School of Engineering claim that 75% of hydraulic system failures are caused by contaminates in fuel / fluid

Hydraulic systems are different to diesel fuel systems, so don't try and draw equivalencies between them.

 

[phatman81]

Hydraulic systems are different to diesel fuel systems, so don't try and draw equivalencies between them.

So your saying that air in the fuel is not an issue .. Ok .. Is diesel fuel a lubricant ? ..

 

[AussieHJCruza]

So your saying that air in the fuel is not an issue .. Ok .. Is diesel fuel a lubricant ? ..

Yes, the fuel cools and lubricates the fuel system.

The return-style fuel system will self-evacuate air from the system, for example after a fuel system change, provided there aren't external air leaks through perished rubber lines etc.

if there are air leaks, they should be fixed rather than bandaided with external pumps etc. Toyota designed the system to work, it does that, so why fix a problem that doesn't exist?

 

[phatman81]

Have you looked at fuel that has be jostled due to rough terrain ? .. I've seen foam and air in the fuel using a camera .. The same type of camera used to go down sewers .. The air in the fuel your saying Toyota has designed this problem out of the system .. Can you describe how this works ? ..

If it does this by creating a vacuum then yes I will agree with you and I don't need a air separator .. But the only way air can be separated is by a vacuum .. Please explain to me how the Toyota Engineers designed in a vacuum after the fuel pump ? ..

 

[AussieHJCruza]

Have you looked at fuel that has be jostled due to rough terrain ? .. I've seen foam and air in the fuel using a camera .. The same type of camera used to go down sewers .. The air in the fuel your saying Toyota has designed this problem out of the system .. Can you describe how this works ? ..

If it does this by creating a vacuum then yes I will agree with you and I don't need a air separator .. But the only way air can be separated is by a vacuum .. Please explain to me how the Toyota Engineers designed in a vacuum after the fuel pump ? ..

Yes, the fuel is returned to the top of the tank and drawn from the bottom of the tank...

From memory the pickup also sits in a baffle but it's been a while so I may be incorrect on that.

 

[phatman81]

Yes, the fuel is returned to the top of the tank and drawn from the bottom of the tank...

From memory the pickup also sits in a baffle but it's been a while so I may be incorrect on that.

So are you saying there is a vacuum after the fuel pump ? ..