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Unread 04-26-2010, 11:06 PM   #1
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1990 YJ Wrangler 
Join Date: Mar 2010
Location: Boise, Idaho
Posts: 1,278
YJ fuel tank/pump question

My 90 YJ has the 15 gallon (HA more like 12!) steel fuel tank in it. I am in the process of gathering the needed parts to do a Chrysler small block V-8 conversion with MPI.
My question is this:
I need to get a higher pressure fuel pump for the MPI setup vs my current TBI setup. Will a later 4.0 Fuel pump fit in my tank or will I have to upgrade my tank as well? I have been thinking about going with a later 20 gallon tank, but I am trying to stretch $$$$ very very tight on this one so I'm trying to upgrade only the necessary stuff.
If the later pump wont fit in my tank has anybody had any luck with an aftermarket external pump? I will have to get an adjustable fuel pressure regulator anyway so as long as I can find something that puts out about 50PSI I am good.

Thanks in advance!

90 YJ 5.2 Magnum, AX-15, 231 SYE'd
D44 front, welded/trussed AMC20HD rear. 4.56 gears soonish.
Western 6 lug aluminum wheels, with 35x12.50x15 Wrangler MTRs
[SIZE="5"][URL="http://www.jeepforum.com/forum/f22/myj-build-2-years-ago-today-1197236"]MYj Build[/URL][/SIZE]
MoparFreak69 is offline   Reply With Quote Quick reply to this message
Unread 04-27-2010, 06:05 PM   #2
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1988 YJ Wrangler 
Join Date: Jul 2009
Location: Bunnell, fl
Posts: 3
i got a complete sending unit/pump from jcwhitney for like a hundred bucks puts out 65psi if i remember right and has a different ohm reading for the sender (i cant remember ATM) but other than that im really happy with it hhave had it in the heep for almost a year now and mine is the 4.2 with the mopar multiport kit
ps. get a 15 gal and do the fill hose to make it a 20 gal
I'm All jacked up on Mountian Dew!!!!!
mcg177 is offline   Reply With Quote Quick reply to this message

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