I have a 98 Dodge 1500 PU Withthe 360 in it. Ive had a problem with a multiple misfire in the #8 Cylinder. Ive had it into the shop numerous times and different shops and had quite a bit of cleanning done to the engine but they cant figure out what the problem is..The OBD code is P0308. Any help would be appreciated.

 

Replace the cylinder heads, See the post on other misfire code P305.