If it has a misfire, then the Service Engine Soon light will flash multiple times.

Typically, that'd point to bad plugs/wires, or possibly a coil, but that'd misfire on 2 cyls.

Check the plug wires for burns, cuts, scrapes, frays, or anything not normal looking. Also pull the plugs and see if theres any cracking in the porcelain, and how the electrode is wearing.