Pretty sure the code for that is P0303. I had a cylinder 6 misfire and the code was P0306. It was spark plugs although a few thousand miles later i get the same code... Stumped now.
1998 Jeep Wrangler, 4.0 I6
33x12.50 Goodyear Wrangler Duratracs
3 inch Zone suspension lift, Rubicon Express adjustable front track bar, 1.25 inch body lift.