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ok i have a 92 chevy s10 pickup truck. well ive had problems with it when i bought it used so i just got a new engine 4 it. then it still wanted 2 act up well it was the fuel pump so we changed it but it still wants 2 act up. when u crank it up it'll run fine until it starts 2 idle it will run high then low like ur pushin the gas in and out softly but im not. we think its the carburator but idk. does anyone kno if it is and if so wat do i need 2 do? thanx!