Join Date: Jan 2003
Location: Rapid City SD, Black Hills of South Dakota
You can use 5/16" / 8mm fuel line and it's available at any parts store. You can get 7.5mm line from our usual specialty suppliers like Centerline. About 8 feet should ensure you have some extra left over. And just because you don't put many miles on the car doesn't mean you should go 10 years without changing the hoses. Like most hoses, they deteriorate from the inside, so you won't necessarily know they're bad until you get a 15 psi leak in one . . . . and believe me that will spray atomized fuel all over a hot engine and cause unnecessary excitement.
I think two feet of 1/2" would be enough for the run from the tank to rear filter to the inlet port of the supply pump.
Take a tape measure to the car and get a rough estimate.
This line does not need to be "Fuel Injection" line. Regular fuel line is ok since the SPICA supply system pressure is only about 15 psi, vice about 50 psi in EFI systems.
With regards to the supply pump, you can remove it and pour fresh gasoline in it and let it sit then pour out, rinse and repeat a few times and see if you're getting varnish and crud out of it. It's ok to test run the pump only momentarily dry on the bench. Only enough to say, yea, it actually rotates. Be prepared to have any residual fuel shoot out of it however. The reason we don't run these pumps dry is that fuel is used to cool and lubricate the pump. They are wet pumps with the electrical motor immersed in fuel. Since in the sealed system there is no air to support combustion, there is no fire danger.
You may get lucky and have a fuel pump that was sitting derelict for 20 years actually work, but don't count on it. And if it does, how much long it runs is a crap shoot.
Here's a short rant . . . I you want to badly damage a SPICA injected Alfa, just let it sit for years with stale gasoline and mounting corrosion. OR, you could take a few hour or so and drain all the fuel, remove, pickle, and store in a dry temperate place, the fuel supply pump and blow the system out.
Finally, when installed back into the car with a clean tank and new rear fuel filter, run the outlet hose into a small fuel container and run a gallon or so through it before hooking it into the car's system. Obviously, you need to take good precautions when dealing with open fuel.
Also, make sure the wiring to the pump and ground is in good condition, clean and tight without corrosion. Make sure you're getting full voltage at the supply pump's positive wire. Check your fusebox for corrosion as well. A leaky convertible top lets water sit in the footwells, which evaporates up under the dash and corrodes everything.
And we haven't even started to see how damaged the injection pump is from sitting derelict for 20 years.
Read the guide. It should answer most of your questions.
Last edited by Roadtrip; 04-26-2019 at 09:52 AM.