[coggonobrien]

noticed a slight fuel leak coming from my fuel pump area. just a drip really, underside of fuel tank on passenger side gets a lil wet and a couple small (3-4 inch diameter) puddles will form under car when car is shut off but the drip stops after car is no longer running. I'm guessing I've got a seal that's went bad but since the car just rolled over 107k i figured i may as well upgrade pumps while the tank is down. What do you guys recommend? currently my motor is a basically stock 4.6 with free flowing dual exhaust, home made intake pipe and a 75mm bbk throttle body. I'm going to be swapping a built 4.6 dohc in the next 1-2 years so would it hurt anything to go with a bigger pump so long as it is set for the same psi?? thanks, Dave

 

[birds4us]

Maybe your fuel lines are leaking. They can get rubbed through.

 

[FordFanatic]

http://www.autoperformanceengineering.com/html/fpapps.html

 

[coggonobrien]

Maybe your fuel lines are leaking. They can get rubbed through.

idk, its clear up high so as i cannot see a direct leak. guess we will see when i drop the tank

 

[coggonobrien]

could i run the 255 lph without a tune issue free? i'm guessing that its just set to maintain a constant pressure

 

[FordFanatic]

you might want an aftermarket regulator, although im not sure if its required.

 

[coggonobrien]

k, i wasn't sure if it was one of those deals where the pump was set to maintain a certain pressure then with the updgraded unit it was just able to keep up at a higher rate of fuel consumption

 

[coggonobrien]

any other opinions on the subject?

 

[Bangster]

I would guess it was fuel lines and not the tank or the sender/pump. My 89 forces gas out if I fill it up and it is hot (90 or higher which is like 75% of the time). But I agree, with all that is involved with dropping the tank, replacing the pump with one to match your up coming changes, I changed mine in the 89 when it started making noise and you could feel it in the body. Then again, the car will down for a little while getting the DOHC, I would guess that the pump will last until then.

 

[coggonobrien]

if it is my fuel lines what will that take?? am i going to have to replace the entire line up to the fuel filter? if so how much am i looking at spending?

 

[birds4us]

I know there was a recall in 92 and 93 for this problem, not sure about the 94's, but the repair procedure might be the same.

 

[FordFanatic]

if i had to guess i would say its the gasket on top of the tank (i think its called the sending unit gasket) and its like a $5 part. only way to really find out though is to drop the tank and check it out.

 

[coggonobrien]

if i had to guess i would say its the gasket on top of the tank (i think its called the sending unit gasket) and its like a $5 part. only way to really find out though is to drop the tank and check it out.

k, that's what i was guessing but my dad and i both just kinda decided if the tank goes down its worth it to replace the fuel pump while i'm at it just so i don't have to take it down again any time soon

 

[coggonobrien]

if the fuel line is leaking would there be a problem with bending a new piece of break line and using a compression fitting to hold it? or is the pressure going to be high enough i'm going to have to double flare it

 

[birds4us]

The fuel line is plastic.

 

[FordFanatic]

my dad and i both just kinda decided if the tank goes down its worth it to replace the fuel pump

definitely, the fuel pump kit that i got from ape came with a new gasket, just make sure its the right size. for some reason it was bigger than the original and i had to get a new one from the stealership.

 

[coggonobrien]

ok, thanks for all the help

 

[coggonobrien]

I ordered the lower pressure 255 pump, does anybody know if i will need a regulator to run it?

 

[The Great Obucina]

I ordered the lower pressure 255 pump, does anybody know if i will need a regulator to run it?

i have the hi pressure unit and an Aeromotive regulator since it matches my motor, anywho...tbirdbrain runs a 255 with the OEM regulator.

when you do the pump, you can get away with loosening the driver side straps and taking off the passenger side ones, so the tank hangs down, thats how brain, kluker, and i did it.

 

[coggonobrien]

sweet thanks, i'm planning on my swapping my driveshaft while i'm in there. will this get the tank lower enough that I will be able to swap 'em? also am i correct in assuming that i will have to unhook the filler from the quarter panel?