EFI fuel pumps gone bad!! Help!!

[ohcbird]

The first step would be to make sure you have great electrical connections.

The second step should be the installation of in-tank baffles of some sort. I'd also reccomend some type of surge tank.

Although a 190 would support it, there is something to be said with switching to the 255, or one of the Aeromotive / Accel / Holley units (and many others)... at higher demands, you won't be working the pump as hard.

What pressure are you running them at?

[G's Chop Shop]

I am running the stock fuel filter/regulator from a corvette. it runs at 58psi.

surge tank?

[ccracin]

Most likely you are uncovering the pickup and starving the pump for fuel. Basically running it dry. Turning it on and off most likely is just repriming it. A surge tank is a separate bucket of fuel inside the tank that helps eliminate starvation due to fuel slosh. Running the pump dry alot is not good for it and is probably the root of your failures. I suggest you quit messing with inline pumps and go to this link.

http://vaporworx.com/

This company is owned by Carl Casanove who is a site member here. CarlC is his user name. There is a lot of tech information on his site. It's a great read. His stuff is cutting edge for efi retrofits!

Good Luck!

[Bsinclair]

is the Walbro 190lph you have designed to be mounted in the tank? ive ran into issues using these pumps externally. between slight cavitation and the cooling effect the fuel creates the pump would either fail or not pump enough fuel. you might also have a voltage drop issue causing the pump to run at a slower speed. i run the bosch 044 externally without any issues but its overkill and quite noisy...

[Fishin2deep4u]

Originally Posted by ccracin

http://vaporworx.com/

This company is owned by Carl Casanove who is a site member here. CarlC is his user name. There is a lot of tech information on his site. It's a great read. His stuff is cutting edge for efi retrofits!

Good Luck!

This is the same route I went. I agree with a surge tank without done type of module to keep the pump full of fuel.

Dave

[G's Chop Shop]

Thanks for the info, will definitely help.

[Steve Chryssos]

Vaporworx for sure. Siphons fuel down to the last 1/4", as it has an internal "surge" reserve. You can;t beat that OE grade design. Also, don't underestimate the need for a high quality fuel vent like the II Much Fabrication piece. Gph rating are useless if the pump must oppose suction due to insufficient venting. Many a pump has burned out due to poor venting.

I run both the Vaporworx setup and the II Much kit and could not be happier.