When I am cruising along about 2K RPM in 5th or 6th gear, my car starts sputtering and missing. It makes the shifter shake up and down. Also, when I am sitting idling for quite a while, I get the SES code, and thought maybe it was an oxygen sensor. You guys think these two are related?

 

maybe plugs/wires?

 

bump

 

Have you cleaned your TB? Pull it out and have a look. Also check your egr valve. When you go WOT does it pull strong or miss? If it doesnt miss at WOT its not plug and wires. Process of elimination drive the car and see if it does it anywhere else.

 

Not entirely true. Could still be plugs.. The cylinder pressure could be keeping the electrode contacting the spark plug letting it fire under WOT but then part throttle and cruising it will still miss. I have no EGR valve and the TB is brand new.. I found my problem.. I seemed to have destroyed a spark plug.. opened one of the plugs gaps to a wopping .60 or so. Yikes.. My problem is fixed! .. The one that i destroyed.. the little white thing (guess thats called and electrode) was loose, you could hear it when you shook the plug and also see it move, it was fine a WOT.. it runs smooth as can be now.