coil pack code

Question

hello my coil pack code came up on my 2007 jeep wrangler 3.8 v6 i replaced the pack and also my plug and wires. it didn't solve the problem. my jeep is misfiring on cylinder 3 which leads to lack of power and rough idling. i checked compression and that is good. im looking for some help. thank you

Answer 1

P0303 Misfire number 3 cylinder

When the engine misfire , it means that that cylinder is not contributing. whether it is ignition or fuel. On cylinder 3 have you check the fuel injector connector . slight tug on it see if it comes off if it dislodges or come off the problem there. A compression test is really good to do , but a compression test can miss the problem if there was a slight hairline crank between the intake valve and exhaust valve a compression would not even show  do a running comporession test you need at least 65 pounds to be good,