Here are some possibles:
incorrect ignition timing, excessive play in distributor shaft(also check for faulty distributor cap, wires and etc.), bad or incorrectly gapped spark plugs, dirty air filter, bad ignition coils, binding brakes, fuel filter clogged/ impurities in system, EGR system not working properly, low or uneven cylinder compression pressures ( you better hope its not compression....$$$$$), dirty of clogged fuel injectors, fuel injection malfuction, or restricted exhaust.
incorrect ignition timing, excessive play in distributor shaft(also check for faulty distributor cap, wires and etc.), bad or incorrectly gapped spark plugs, dirty air filter, bad ignition coils, binding brakes, fuel filter clogged/ impurities in system, EGR system not working properly, low or uneven cylinder compression pressures ( you better hope its not compression....$$$$$), dirty of clogged fuel injectors, fuel injection malfuction, or restricted exhaust.
