Fuel lines

[k5blazerguy]

That's a challenge with the GM setup, then, unless the pump goes in the tank. The tank is about the lowest point on the truck. So the only option is to find an in-the-tank pump that plays well with PWM, and ditch the HydraMat. Which means probably selling the tank and buying a new one, based on what I'm told about how hard it is to get the Hydramat in the tank. A bigger tank would be nice, but I don't know if I have room for one under the truck. The one I currently have seems to take up all the space.

i sent the FiTech to them last month to get tested and possibly rebuilt, I haven’t heard anything back from them yet......
This FiTech was on my Stepson truck, his dad had it installed and the guy who did it just mounted the external pump on the frame and spliced into the fuel lines. To me all of it seemed very “half assed”. But it was working so whatever, I have my own projects to deal with lol. After a couple weeks that pump died,.....replaced it........week or two later, truck wouldn’t start again, can’t remember what that problem was, then last about another month or so and then wouldn’t start again. The guys said it was the computer for the FiTech.,.....keep in mind he’s 16 at the time and likes to hang with his friends and he was driving this truck all day everyday.
his dad got tired of the truck having issues so he had the guys slap a Holley back on it.
I feel like if they had done it right the first time no issues. New tank, with pump in tank,.....new fuel lines,.......it prob still be running the FiTech. Do it right the first time is what I live by.
so instead of that FiTech collecting dust last year or so.....I’m gonna use on my rig! Lol.

 

[Weird Beard]

Holley is offering drop in pump modules for a bunch of applications. They are designed to run only with pwm as they are returnless. I'm running one in my Buick wagon. Works well but I prefer to run a return line and have the pump running at 100%. I think Spectra and others are reproducing the tbi tanks.

 

[k5blazerguy]

FiTech determined the ECU was bad, $340 later, its on its way back to me now with a 6 month warranty......So I'm gonna order an 87 up tank, sending unit and pump from a 96 vortec........Its kinda hard to find the rear fuel lines for a 87-91 blazer, so I may just get -6 AN fuel line and fittings and just make my own lines....I have the FiTech fuel filter but I may just get a stock filter since they are proven and reliable.....

I was looking at the Corvette fuel filter, but it seems better to run a return line straight from the FiTech unit?
I know I need to get adapters from the sending unit to AN fittings, whats the proper name of the fitting type/size used on the sender and for the fuel filters so I can order them?

 

[Weird Beard]

On my last build I used a NAPA 3482 fuel filter. It's the same as the one that came with my Edelbrock proflo efi kit. It has 3/8 barbs so it's easier to plumb. As for AN fittings, it depends on your air cleaner setup/ clearance. I usually use a 90° 3/8 to 6AN on the inlet and outlet. You may be able to find a 6AN to 5/16 for the return line. Russel has fittings that convert the fuel pump sender fittings to AN as well.

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[anwat]

I've always just called them GM tbi fuel lines with the O-ring. I know the thread is a M16x1.5 on mine. The return is 14mmx1.5. Just make sure you keep the front lines, the fitting that goes into the throttle body...wait, never mind. You're putting a FITech on there.