03 xterra running rough p0300 & p0328
Hey guys I'm having a problem with my 03 xterra , it has the v6 3.3,
It continues to run really rough and almost stall when motors warm .. So far I've replaced the plugs , wires , distributor, knock sensor , yet still have the problem .. I'm also noticing some black soot under the truck coming from the exhaust .. The codes were p0300 & p0328 . Which is misfire and knock sensor .. I did notice when I replaced the plugs that the #6 plug in the back was black colored , the rest of the plugs were caramel colored , like they should be ..
I'm thinking maybe a coil is bad ? Are there 6 separate coils for each cylinder ?