I have an 05 spectra5 mil is on and dtc indicate cylinder 3 and 4 misfire and random multiple cyl misfire, changed cam and crank position sensors and no change anyone had this problem or know where to begin looking to fix it?
I have "found" water in the spark plug wells on both of our Spectras (06&07). It got under the "pretty" plastic covers and down into the wells.. Mine was in #4 and was throwing P0304 and a CEL... I cleaned out the water and dried out the well, plug and wire.. and all is well...
On my wifes 07 she had poor idle and misfire on #2 receintly and it came down to a "lousy" Champion spark plug. The center ceramic electrode insulator had broke free and was covering the electrode end. It would slide up and down... I replaced all of them with NGK plugs...No more mis-fires.