"CHECK ENGINE SOON" light came on. After a couple of days truck started sputtering, running with no power. Had it scanned and had a "Random misfire code" P0300. Scan did not specify exactly which cylinder. Also shows P0420 code.
I changed the plugs and I know the plug wires are good because I switched them from each side. Computer shows misfire on Bank 1 ONLY (cylinders 1,3,5,7).
I don't think all coils will go out at once. Also had a P0420 code the first day I had it checked.
Any suggestions? Please HELP?