89 YJ-Fuel System Help! - Jeep Wrangler Forum
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Old 07-20-2016, 12:50 PM
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89 YJ-Fuel System Help!

Hello everyone, brand new user here. I've been stalking the forums for a while since my dad and I are preparing to try and start his 89 YJ that has been sitting in the garage for 7 years. It has a 4.2L engine WITH a Mopar MPI Fuel Injection conversion. We already know what we have to do for the most part, except we have no idea what to do with the fuel system. We believe it was left with gas in tank, don't know what to do as far as draining and flushing/cleaning the system. Help!

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Old 07-20-2016, 05:44 PM   #2
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Was it running with the FI? If so I would drop the tank clean it out, new fuel filter and lines, pump and sending unit....you could try to clean it all up ad reuse but if doesn't work your right back to dropping the tank....
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90' YJ 4.2L 5spd, OME 2.5" Lift w/OME shackles, 1" BL, Clifford 6=8 upgrade, Weber 38, HEI, 33 x 12.50 KO2s, slave swap, SWAG tailgate, SYE, sporting a "Woody" DS, 8.8 running 4.10s, Warn Pt 10s, ARB locker up front.
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4.2 , 89 yj , flush , fuel system , turn over

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