87 2.8 l 6 cylinder on 1990 Chevrolet Cavalier

it started missing at low rpms and then gradually higher when i accellerated. now it always misses and im am loosing a lot of power

Asked by for the 1990 Chevrolet Cavalier
Check the obvious things like vacuum leaks, plugs, wires, cap and rotor. Check the engine cylinder compression too.