broncofan70

Hello all!

I recently hit 100k on my truck and changed the plugs. After changing the plugs I was getting misfire codes of 0303 and 0305. After getting new coil packs and another new plug it ran great for a day. I am now getting a misfire code of 0303.

Anyone else have this problem? Any suggetstions

Chris

ji603

Swap the cop from cylinder 3 with another one, see if the code changes to show a misfire on the new cylinder? Then you know your prob is with the coil pack. You are using motorcraft evrything right? Not bosch?

broncofan70

I did the swap and it did code not another in addition to the #3. Ended up being a cracked plug and that burned out the coil. Yes, I am using all motorcraft parts. Running like a champ now.