Holley fuel pump

[Dobster]

I have done a seach and found no info on this pump that is in my truck and working now it just takes several times to start the truck. like the fuel is draining back into the tank and the line fills with air. Is my fuel pump too far back? It's right at the fuel tank?
Holley Comp Series 44424-01, rev-a, 19-09-07, 77OF1
This is the info off of the pump.
Anyone know about this pump ?
Or how to fix the delayed start problem?
Thanks,
Doby

[BR3W CITY]

Well when you turn the key to IGN/on, the pump should be able to prime any air out pretty quickly, enough so that you really shouldn't have to wait. I always go key on for about 2 seconds before starting so my pump can prime and my DBW pedal/tb can do their calibration check. I never have a failed start, even when I do choose NOT to prime.

As for WHY, that could depend on a couple of things. How high is your pump above the pickup point (or is it in-tank?) Do you ever smell fuel when attempting to start the truck?

You could install a check valve in the fuel system, but I don't see this done as much lately. It made sense with a suction system, but since most efi cars push fuel instead of pulling it, the pump itself has a sort of check valve effect.

Can you show us pictures of your fuel system and or give us some more info on what is happening when you try to start it.

Oh and BTW I can't find ANY info on that pump, and I live somewhere between the internet and a stack of racing parts catalogs. Holley FP part numbers all start with a 12-xxxx , none of the info you posted corresponds to anything current, and I can't find anything legacy either.

[Dobster]

Originally Posted by BR3W CITY

Well when you turn the key to IGN/on, the pump should be able to prime any air out pretty quickly, enough so that you really shouldn't have to wait. I always go key on for about 2 seconds before starting so my pump can prime and my DBW pedal/tb can do their calibration check. I never have a failed start, even when I do choose NOT to prime.

As for WHY, that could depend on a couple of things. How high is your pump above the pickup point (or is it in-tank?) Do you ever smell fuel when attempting to start the truck?

You could install a check valve in the fuel system, but I don't see this done as much lately. It made sense with a suction system, but since most efi cars push fuel instead of pulling it, the pump itself has a sort of check valve effect.

Can you show us pictures of your fuel system and or give us some more info on what is happening when you try to start it.

Oh and BTW I can't find ANY info on that pump, and I live somewhere between the internet and a stack of racing parts catalogs. Holley FP part numbers all start with a 12-xxxx , none of the info you posted corresponds to anything current, and I can't find anything legacy either.

I tried to make a short video of the start up. The best way to show you whats going on. But having problems loading the video. I did manage to take a picture. I hope it loads.

It is pumped through a corvette type filter for the return line. It also is just on the other side of the gas tank. I think this is why i have a start up delay. It seams to pressure up and the pump stops then I try and start the truck. Only starts on the second try.
Not a bad problem but it should start on the first crank after allowing the fuel pump to purge.
Thanks,
Doby

[BigDan3131]

I think its time to redo your fuel pump setup. In that picture, that large object is the pump? If it is that's got to be a very early model of pump they might have been trying to upgrade from the standard red and blue pumps they sell. That short length of hose needs to go away, its not needed with the right fittings. That black Jegs item is a filter and the line coming out of it goes forward to the engine? If it is that hard 90 degree fitting is a major restriction of fuel flow. So the return line comes back to the tank and goes through another filter and then into the tank? If that's the case its putting unneeded pressure in your system causing another restriction.

[Dobster]

Originally Posted by BigDan3131

I think its time to redo your fuel pump setup. In that picture, that large object is the pump? If it is that's got to be a very early model of pump they might have been trying to upgrade from the standard red and blue pumps they sell. That short length of hose needs to go away, its not needed with the right fittings. That black Jegs item is a filter and the line coming out of it goes forward to the engine? If it is that hard 90 degree fitting is a major restriction of fuel flow. So the return line comes back to the tank and goes through another filter and then into the tank? If that's the case its putting unneeded pressure in your system causing another restriction.

I new the fuel system was old and in need of replacement when I bought the truck.
I really want to thank you for helping me. I have been trying to be cheap and just get by by possible replacing just the fuel pump. I would like to install a new tank with a fuel pump inside but cost is a factor. I can wait till I have the cash and get the complete fuel cell or just replace the pump and line and get it done. A lot of people use the 255 in line pump and I am thinking that would be fine. I have to do something soon.
Thanks again !

[Wasted Income]

I'd go with a Bosch 044 inline instead of a Walbro 255. The Walbro is a popular choice, but they don't flow as much fuel, and they are nowhere near as reliable as the Bosch pump.

[BR3W CITY]

I also think that filter may be a regular jegs fuel filter, up until that last year or two jegs didn't make a store brand filter that was rated for 60+psi, at least not in the "jegs" brand. Now they list some for fuel injection, but it may be worth checking so you don't just collpase the filter.

[Dobster]

This is great info Thanks,
I am concerned about the bosch being too loud and it cost about $60 bucks more. lots of people have good luck with the walbro 255.
I am going to check the jegs and/or get a new filter on the suction side.

[Dobster]

Originally Posted by BR3W CITY

I also think that filter may be a regular jegs fuel filter, up until that last year or two jegs didn't make a store brand filter that was rated for 60+psi, at least not in the "jegs" brand. Now they list some for fuel injection, but it may be worth checking so you don't just collpase the filter.

I will be replacing my filter and pump.
The filter I am thinking about using is from summit its made by Edelbrock #EDL-8130 rated at 75lb max pressure. Would this work as a pre-filter?

[68GMCCustom]

Interesting...and something I need to remember when my Walbro dies.

[68GMCCustom]

as an external.....I don't think I would call the Walbro 255 "quiet"

[Dobster]

I am replacing my out of date fuel pump and pre-filter.
I have a list of replacement parts I would like to know if these will work and if not why.
I am keeping the tank that is already installed under the bed of the truck. I will be replacing the pump, prefilter, some fuel line. Relocating the pump closer to the engine (under the driver seat area). It is currently in the rear by the tank outlet. It has a jegs prefilter that looks like the new one I am thinking of buying soon, this is the part in question part #EDL-8130 fuel filter max pressure is 75lbs from summit, will this work ok?
My list of new parts from summit.
Walbro 255 lph/Part # VPN-GSL392
2>< RUS-670470 6AN fittings
SUM-230610 SS braided line 10ft
Edelbrock EDL-8130 inline fuel filter
The existing corvette filter/regulator and post filter I am re-using.
I would like to also install new line from the post filter to the fuel rail.
the hard line that is there now has a bad kink in the line. I am not sure about the factory fitting connecting at the fuel rail or where to get it?

Sorry for the long post
Any help is greatly appreciated

[BR3W CITY]

Originally Posted by Dobster

Relocating the pump closer to the engine (under the driver seat area). It is currently in the rear by the tank outlet.

Putting the pump closer to the engine in an efi setup won't be good for anything. All it will do is make the pump draw harder to suck fuel that far. It will if anything make the problems worse. Putting the pump lower or more even with the tank pickup would benefit it more.

The filter you listed appears ok, I would just double check the desired Micron levels for a pre-filter, because that listing shows its 40 micron, but the description says 10 micron.

[Dobster]

Originally Posted by BR3W CITY

Putting the pump closer to the engine in an efi setup won't be good for anything. All it will do is make the pump draw harder to suck fuel that far. It will if anything make the problems worse. Putting the pump lower or more even with the tank pickup would benefit it more.

The filter you listed appears ok, I would just double check the desired Micron levels for a pre-filter, because that listing shows its 40 micron, but the description says 10 micron.

By putting the pump closer to the engine it will be more level with the tank outlet. The line will go up then back down to the level of the tank and pump. I am hoping this will help with having to crank the truck twice in order to get the fuel into the rails. Others have installed the pump and filters in this location with no problems.

Its a 40 micron filter. Is that good enough for a pre-filter?