try carb cleaner, fuel line cleaner, new fuel filter, new spark plugs and wires and maybe cap and rotor, maybe the module...
could be any number of things
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91 Chevy Suburban Tonawanda 454 R2500 - SOLD!!! 
04 Dodge Durango 5.7L Hemi 2WD, 24K miles (as of July 2011)
In the past 30 years about 90% of Fords are still on the road, the other 10% made it home.
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