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Unread 08-01-2012, 08:05 PM   #1
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1980 CJ7 
Join Date: Jul 2011
Location: alden, ny
Posts: 36
cj fuel tank w/fuel injection

putting fuel injection on my 80 cj7 any one put a wrangler tank with internal fuel pump in a cj7?

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Unread 08-01-2012, 09:50 PM   #2
only in a jeep cj
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1986 CJ7 
Join Date: Jun 2001
Location: Mobile, Alabama
Posts: 4,126
I know first hand the YJ 20 gallon will not fit into the CJ frame due to the width. Ive read the YJ 15 gallon will and you flip it around to have the filler on the CJ side....someone will need to confirm.

1975 CJ-6 304 T15 Dana20 30/44 3.73
1983 CJ-8 258 T5 300 30/44 3.31 Looking for full or half hardtop buy or trade
1986 CJ-7 Laredo 4.6 stroker T5 300 30/44 3.31
1986 TJ-7 Trail Jeep project in the works
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Unread 07-03-2013, 10:13 AM   #3
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1983 CJ7 
Join Date: Jun 2010
Location: Stafford, VA
Posts: 47
The late model (91-95) 20 gal plastic tanks will not fit in a CJ frame as mentioned above.

87-90 YJs with the four cylinder motor had throttle body injection. These are 15 gallon tanks and will fit in a CJ. The fuel fill is on the wrong side. I used it as is because I have a YJ tub. I don't know about flipping it around, might work. Would need to do something with the fill and vent lines. The 4cly tank/pump will run a Jeep 4.0 no problem, my used tank/pump has been running my swapped in 4.0 for 6 years. The fuel gauge sender will work with the CJ gauge but it will read backwards!

I've been told the pump will run a LSx motor, and will be testing that soon.
1983 CJ7, 4.0ho, NV3550, D300 4:1, Fr D44 Detroit, Rr D44 OX, 4.56, 35" SSTs on beadlocks
1967 CJ5, 231,T18,D18,4.88s,Warn OD, 11" drums, locked/locked
1979 K5, 454,TH400, NP205, D44, 14b, 35" BFGMTs
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Unread 07-03-2013, 10:35 AM   #4
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1980 CJ7 
Join Date: Jul 2011
Location: alden, ny
Posts: 36
I used the 15 gallon tank from 89 with 4 cylinder tbi, I had to rotate the tank 180 degrees and used the hoses from the 89 along with my orig new ones with a thin wall round piece of small pipe to get the angle correct , I purchased a sprectra tank and t-rex fuel pump set up. the tank was about 100 and the t-rex pump and sender was about 180. I put a tbi on my iron duke engine and used the intake from an early fiero. also I used the fuel pump controll wire from the ecm with a relay. the set up is flawless and works very well. make sure to use the fuel filter for fuel injection as that the higher psi will not hold up in the carb filter. 10 gauge wire from your relay to your fuel pump. relay wiring-- 85 ground 86 pos output from ecm 30 battery fuzed at 30 amps 87 out to fuel pump pos. wire
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Unread 07-03-2013, 02:55 PM   #5
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1986 CJ7 
Join Date: Feb 2011
Location: Muskegon, Michigan
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I used the 20 gallon tank from my 86 CJ and just combined the Chevy and AMC sending units to get an internal pump in a CJ tank. Works great so far.

Dave in Muskegon
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Unread 07-03-2013, 02:58 PM   #6
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1982 CJ8 
Join Date: Oct 2012
Location: San Jose, California
Posts: 64
I use the airtrex E2000 external pump (same as the mopar mpi FI kit) and carry a spare ($70). If there is a issue I can get to it easily for a trail fix. The first one has lasted 3 years and is still performing well.
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Unread 07-04-2013, 01:31 AM   #7
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if you go to an in tank pump, which i discovered over the years is preferred over the E2000, cut an access hole in rear tub., After dropping my tank 3x, i learned fast. while i rely on the in tank set up, i have plumbed in the external set up if needed. Switch over the supply line and power, prime and drive away. Also i converted all fittings to -AN6. Beats t he heck out of hose clamps and dried out fuel lines, especially where it crosses over top of exhaust.

here's the hatch and the quickie cover. good luck

Who is John Galt?

Life member BRC
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