fuel pump problems

[txhunter69]

there is an ad posted on this site for a holley black electric fuel pump but it says that it cannot be used as an efi application is that true

[chevynovaman]

THE HOLLEY BLACK PUMP PUSHES OUT ABOUT 14 PSI, PROBLY NOT GOING TO WORK DEPENDING ON EFI SETUP, MY 57 IS LS1 FUEL INJECTED AND CALLS FOR AROUND 60 PSI, I WENT WITH A EXTERNAL WALBRO FUEL PUMP, WITH PUSH LOK HOSE HIGH PRESSURE HOSE. YOU CAN GET THE WALBRO PUMPS FOR AROUND 100.00 NEW

[txhunter69]

so you don't think that pump will work on my 92 chevy efi with the 350

[txhunter69]

also what pump would be best?

[Tod74]

also what pump would be best?

If you are using the stock efi stuff why can't you use the stock pump? I never messed with efi that wasn't stock but I do know that Holley pump won't work.

[zipper06]

Nope will not work, even a throttle body injection requires 15/16lbs of pressures to work properly, EFI's require 40 plus lbs of push and return lines. EFI nozzles are usually 32 to 40 lb nozzles, that why most people put in the tank fuel pumps on conversions. I have one for my 1979 El Camino but haven't installed it yet, it requires a tank made for a in the tank pump, a 1992 yellow plug computer, and a closed loop painless wiring harness, that's one of the reasdons i haven't installed it yet. it's definately not a couple hrs installation.

JMO

Zip.

[txhunter69]

ok so no go on the hollley but then what brand should a get because mine is slowly dying im losing power and have a pretty bad lag lately and yes a have changed the filter did it last week and that wasn't the problem

[chevynovaman]

THROW A FUEL PRESSURE TESTER ON IT AND SEE WHAT YOU HAVE, YOUR PROBLEMS MIGHT NOT BE THE FUEL PUMP...

[txhunter69]

ok that sounds like a better plan than replacing it but jw what are the most common problems that have the same issues as i have

[cepx111]

It would probably help us to to know what it is your having the problem with first I.E > year, make, model, engine size, tbi or efi, etc etc....

[txhunter69]

efi 92 gmc 1500 ext cab short bed 350 havin real bad problems with a lag when a floor it it feels like its just not gettin enough fuel and its the stock pump and im at 152k i changed the filter to see if that was the problem but no such luck so idk all other filters are new along with the oil so i have no clue :cry:

[Tod74]

Get a fuel preasure gauge and see how much psi the pump is putting out...that will help eliminate the fuel pump if it isn't it.

[txhunter69]

preasure is fine tested good but now im out of ideas :evil:

[CamBirdRacing]

Back a couple of posts, usually when the fuel pump on those trucks goes bad, they just quit, they don't slowly die and if you ever need to change it, it's easier to pull the bed off than to drop the tank.

Probably just need a good tune up, ei cap,rotor,wires and plugs. Have you tried to run it with out the air filter and see what happens? maybe the cam going flat, I think that was a problem on those engines also.

[txhunter69]

ok so if i take off the air filter what would a be looking for

[CamBirdRacing]

Just to see if it runs any different. It's cheap to do and if it improves then theres the problem. Mostly unlikely though.

[chevynovaman]

ANY SERVICE ENGINE LIGHT?? IF SO AUTO ZONE OR ADVANCED AUTO WILL CHECK IT IF ITS THROWING A CODE... I HAVE SEEN A FEW CATALYTIC CONVERTERS PLUGGED BEFORE... PULL THE PLUGS AND SEE WHAT THEY LOOK LIKE..

[txhunter69]

haha thanks but no cats 3 in strait pipe down to single chambered race series flowmasters and they pullled up egr so a just took that off the motor and blocked it off but that was a long time ago

[Tod74]

I just had to put a pump in my Dually with half a tank of gas in it...in a driveway...by myself. NO FUN. I did it from below