hellsknight02

ok I pull all the plugs out and the back three (closest to the fire wall) were fine. The front three were very black and corroded. There's also a presence of oil on all front three. Does this mean that I got a bad head gasket? It has burn some oil lately.

Thank you all for the inputs. The spark plugs were all changed about 3 months ago, so I'm sure they are still good. I will check the coil, fuel pressure and double check the plugs. Thanks again for the input everyone. Can anyone confirm if 2,4,and 6 are the ones in the back.

My 95 lexus ES300 is idling really rough and the check engine light was on, so I took it to the automotive store and had them run the code reader for me.

These are the code I got from the reader. Codes are: P0302 (Cylinder 2 misfire), P0304 (Cylinder 4 misfire), P0306 (Cylinder 6 misfire), and P0170 ( fuel Trim Malfunction Bank 1). How do I fix this problem? Why is it only on head 2, 4, and 6? Any help will be appreciated. Thank you.