Is it possible to run an inline fuel pump in my 90 GTA with the intank pump? I think it is on its way out, and I would rather disable it and install an inline than pull the tank.

 

hey,

I think the reason manufacturers put the fuel pump in the tank is because it's easier to push the gas through a pump than have a pump suck it through. There's less resistance/strain on the pump if it pushes, instead of pulls.
Correct me if I'm wrong,

87GTA57L.

 

Yes, this will work just fine.

I did it on my 89T/A, of course, you may be a bit differen, ifyour running a fuel injection, cuz you need all that PSI.

I run a carb, I bought the Holly Red.

 

I like the Holly as well, but I am running TPI and really want to verify if an inline pump will work with a bad in-tank pump and what I need to do. I am looking for up to 55psi in pressure just in case. I don't know why GM designed it this way, maybe it is a a push vs. pull. But I still say they were on crack when they designed this.

 

you will still have to remove the old fuel pump out of the tank or else it will become a restriction when the in-line pump is trying to maintain fuel pressure. This will put unnecessary strain on the pump.

 

If you have to go into the tank to remove it, I'd reccomend a high volume/high pressure in-tank pump. Will be much quieter and probably last longer. I have a Holley in-line pump on my car, 45psi 255lph, and it gets kinda noisy when it gets warm.

 

I also have a noisy in-line pump when it gets warm. I believe the problem with high flow in-line pumps they need larger fuel lines. My Mallory 5110FI says it needs at least 1/2" supply and return line. The smaller stock lines are causing too much restriction and putting backpressure on the pump head making it work harder and hotter.

 

I have talked to others who have left the pump in, kept it connected and installed an inline and it worked fine. Can't really get an unamimus verdict on this one, but I tend to agree with you Redbird... Gonna go with the Holley intank. I know its a pain, but I would rather be sure about the fuel delivery.

Thanks for everyones help!

 

My EFI setup has you place the fuel in the fuel line between the gas tank and the EFI, I haven't had any problems with it but, I never had a in tank pump.