i am running a 3.1 MPFI intake pump to a mallory 3 port regulator

well the pump finally died on me today (on the way to a job interview nonetheless)(a very friendly police officer was nice enough to give me a lift to the place though)

anyways, i need to know a few things

are their any special tools needed to remove the pump from the tank
i know on newer cars (saturns) that you need a large "socket" that fits around the pump assembly to loosen it

secondly, how is the return line mounted in the tank

i ask because if at all possible i would love to upgrade my return line to 3/8"s

also, i have been driving the car like this since summer time, do you think that using the regulator on the high pressure pump killed the pump?

i measured the fuel pressure and i was able to tune it all the way down to 3 PSI, if that matters at all

i have it set at 5 PSI currently

also, i am prolly installing a fuel pump from a TPI car, since i might be upgrading to EFI in the future


facts? comments?

 

on my bosses 350 tpi when i recently changed his fuel pump, i believe it was just a set of standard/metric size bolts (i cant really remember) but none the less i did it without any "special" tools..

and the supply and return line were just lil in-line clips that could be disconnected, now i'm sure its different on something older (my bosses is a upper 80's, lower 90's buick) but either way, once u drop the tank you'll be able to see everything with ease.

do yourself a favor and drain the tank =]

 

on my bosses 350 tpi when i recently changed his fuel pump, i believe it was just a set of standard/metric size bolts (i cant really remember) but none the less i did it without any "special" tools..

and the supply and return line were just lil in-line clips that could be disconnected, now i'm sure its different on something older (my bosses is a upper 80's, lower 90's buick) but either way, once u drop the tank you'll be able to see everything with ease.

do yourself a favor and drain the tank =]

I've had my car for 2 years now driving it all summer and my brother, its previous owenr has had it for longer... when switching to carb, instead of using a fuel pump on the side of the block he used the TPI pump inside the tank, with a regulator of course

havent had any problems with gas feed what-so ever.. its not like the pump is working any harder

 

ok cool
L98 pump it is then

i should have asked............is it possible for me to get rid of the hard return line and use AN-6 all the way into the tank

reason is:

i have the factory hard lines 1/2 toward the front of the car.........in the center of the car i cut them and added 6AN-s that go all the way to the AFPR (i did this to keep the lines away from the headers at all costs)

problem is the only way i could connect the 6-AN to the 5/16" return line turned out like a botched abortion and i am not happy with it at all (i have come of age and i can not stand hack jobs any longer)

it doesnt leak, but its definetly not "correct"

thank you

 

i believe you can... you will need a special fitting

(either 14 or 16mm*1.5) along with an adapter for the braided line if it bothers you that much... I do understand the lack of happiness when something is all butchered up.

I pulled this from a post i read on this site, it may be what your looking for

http://www.earls3.com/

 

ok, so i will need a special fitting for the tank

now is probably a stupid time to ask, but the hard fuel lines on a 1991 are standard (not metric) correct?

 

no such thing as a stupid question but i already answered your question with the size fitting you'll need

mm, they are metric... 6an is equal to 3/8 hose...for your reference..

as far as i can think of the return line is 14mm*1.5 and the feed line is 16mm*1.5 (u can search n find out for sure but i know i am right)

now... few thigns is i think they are reducers (you may have already eliminated them cause i dont know where they are at nor can i remember from my expierence) for the return line that take it from 14mm to 12mm, at the end theres a seal of some sort, thats where u need to buy an adapter (earls I think has it, u do the searching lol) then u use your fittings to take the the 6an line to the adapter

i think thats all u need to know