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My dad's 95 4.3l starting killing on him today. It will idle rough for a few seconds before you have to tap the gas pedal to keep it running. If you push too hard on the gas pedal, it will kill. I don't know if this is a clogged fuel filter or if it might be blocked injectors. Does anyone have any ideas? Would running seafoam through it help it out at all? We're going to try changing the filter and running either injector cleaner or seafoam through it tomorrow to see if we can get everything cleaned out. Does anyone else have any ideas or suggestions?