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You didn't say what motor size. If it's the 3.9... check the air switching relay and the canister purge solenoid. (TBI systems). There are three solenoids located together just to the left and slightly behind the carb. The Air switching solenoid is in the center and the canister purge solenoid is to the rear. Also check the charcoal fuel canister for a broken fitting (replace it), and DOUBLE CHECK the fuel tank fittings and fuel lines for a broken fitting or sucking air (most likely the cause. I just solved my problem with the same issue. Had a broke fitting on top of the tank, on the vapor canister and a bad solenoid. Took forever to start the truck, ran rough, smelled raw gas and after about 3 weeks accidentally noticed fuel running out of my tank when I left it idle to recharge the battery.

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