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07-20-2003, 08:00 PM
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1069558
'89,YJ,Carb,4.2,mech.fuel pump.
On any bumpy road, it builds too much presssure in the fuel tank and sprays gas all over the 1/4 pannel,tire, springs etc. from the roll over valve. I've replaced the roll over valve, rubber housing, & gas cap., checked all lines from motor and charcol canister. NOTHING seems to help. ANY HELP PLEASE, I'M AFRAID IT'S GOING TO BLOW UP BEFORE I CAN FIGURE IT OUT! P.S. It also sprays gas all over the muffler. :-? :-? :-? [addsig] 
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07-20-2003, 08:00 PM
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1069588
do you have a vented gas cap? you should have a vent line on the tank to relieve that... it might be missing/plugged[addsig]
__________________
93 YJ 4.0 Spring Over, 33x12.50 Mastercraft Courser M/T, High Flow Exhaust, Diamondplate Rear Bumper, Trimmed Flares, 6\" spotters  We, the Sovereign People of the Universe, wish to live in peace. We live among you, but we are not of you.
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07-20-2003, 08:00 PM
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1069691
The fuel system is a close loop system, with a supply to the carb, and a return back to the fuel tank. The pump supplies fuel (under small pressure) to the carb inlet, the remaining unused fuel is returned to the tank.
Your tank will have a vent line, you need to inspect it for any kinks. [addsig]
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