I had a code telling me I had a bad upstream bank 1 o2 sensor, and running lean. Drove it a little until I was able to change the o2 and the P 0306 code showed up. The misfire is noticeable for sure. Pulled the plug, looked a little oily, not terribly, replaced it. No change, got an inline spark tester and I definitely have spark at the plug. all codes cleared but the misfire at this point. I am assuming, and maybe I shouldn't, that the spark at the inline tester tells me the wire and the coil are good. The next issue I can think of would be the injector. Would a seafoam treatment be a good idea for a possibly fouled injector? I ran seafoam in the tank (half a bottle to 1/2 a tank of gas) and then filled the tank up at about 1/4 with no seafoam. This has occurred about 1/2 way through that second tank.
Any ideas? do a a seafoam? Am I wrong on assuming the coil is good? Should I look at the injectors? anything else?
Help would be great.....
Any ideas? do a a seafoam? Am I wrong on assuming the coil is good? Should I look at the injectors? anything else?
Help would be great.....