I HAVE A 1997 CHEVY CAVALIER 2.2 WHEN I CHANGED THE PLUGS IT WAS MISFIRING SO I CHANGED THE WIRES AS WELL THEN A CODE CAME UP(CYLINDER 1 MISFIRE) I HAD A BAD WIRE SO I CHANGED IT AGAIN AND IT RAN FINE,THEN A SHORT TIME LATER I FELT A SLIGHT MISFIRE SO THINKING IT WAS CY1 I CHECKED THE PLUG AND IT HAD SMALL BURN CRACKS IN IT SO I REPLACED IT AND IT RAN LIKE NEW BUT ITS HAPPENING AGAIN SO I CHANGED A SECOND TIME SAME THING I NEED HELP SO I DONT GO SPENDING LOTS OF MONEY ON PARTS I DONT NEED.