what causes my blazer to miss fire on the number four plug when it gets warm on 2001 Chevrolet Blazer

when put on the computer it shows the number for plug to be miss fireing but it only does it when it get warm up

by in Hurst, TX on April 12, 2012
1 answer 1 comment
ANSWER by on April 12, 2012
COULD BE PLUG, WIRE OR A NUMBER OF OTHER THINGS
COMMENT by on April 12, 2012
ok ive changed the plug wires the rotor,distributer cap,plugs coil pack and the spider full injection valve its still running rough and computer is reading number 4 cylinder miss fire but it only starts to run rough when the engine is warm any other suggestions what am i missing here help please