I ran some tests with the tank completely removed, gauge on the pump housing outlet, hooked to a fully charged battery.
First with the old new pump and the new regulator, then with their 'plug' in the pump housing.
Same crappy psi.
Put new, new pump in, new hose, and I didn't bolt the pump housing in completely, just 4 of the 8 nuts.
Hooked to battery, gas leaked out the top edge.
What the?
With the red plug in, there is no return, gas should just deadhead at gauge.
Even with their regulator in their pump housing, gas would return straight down.
So, I think I know the issue.
FiTech says, don't put a clamp on the upper end of the hose, it is a barbed fitting, the hose slides on, and you cannot pull it off.
Put a clamp on the lower end at the pump.
Problem is the hose gets soft, expands, from the pressure, then leaks. They will tell you this, and told me multiple times, so I replaced the hose multiple times.
A clamp won't even fit there, I tried. It hits the tank mounting ring in any position.
A longer fitting would allow a clamp, but the housing is aluminum and I don't think I could find an aluminum fitting around here.
I never would have known the upper barb fitting leaks almost immediately if I didn't leave 4 nuts off when I tested it.
Gas sprayed right at the top horizontally towards the pump housing o-ring.
So, I cut another new piece of hose, made sure it was perfectly square, slid it over the barb fitting, put it all back together, 100psi.
Put the tank back in, hooked everything back up, 58psi at the throttle bodies, nice!
Reset the ecu, went through the entire process, started.
Took it for a ride, fine.
Took it for a longer ride, 40psi.
By the time I got home, 24psi.
The pump I have is 40019.
I find it odd that it supersedes pump 50019, which had a clamp on both ends.
I bought a new tanksinc tank and cut a 4.5 inch hole in it for this pump, and most other pumps out there require a smaller hole, but theirs use AN fitting, which I preferred. I told them this the last time we spoke.
They have been extremely helpful, and this system is awesome, however I see this as a clear design flaw.
Think about it, a barbed fitting comes to a point, the hose goes over it which leaves a space between the opening and the hose. Add 100+psi, how long before it pushes past the barbs?
A longer fitting that accepts a clamp would solve this.
I sent an email to the guy helping me requesting a call.
They need to fix this.
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