Fuel Hoses Lines/piping And Fittings problems of the 2007 Honda Accord

Per Honda manual recommendation for a tune-up @100,000 mile; on April, 2013 I went into nalley Honda for my 100k tune-up. Shortly after this service was performed, my car stared to pulsate. I return my car back to dealer and was advised I need a fuel flush. They stated this was not part of the tune-up, but should be done with a tune-up. I paid for a fuel flush. The problem still existed. I went back to the dealer and inquired if they had changes all six of my plugs and wires. They said yes. . . I asked why was I still having this issue after getting a tune-up. I was asked the grade of gas I use. I told the service tech 87, that is what the manual recommended. I was told to try 93 grade for about a month to see if that will filter and clean the lines. I did. . . However, the problem still occurs but not as bad. I call and scheduled an appointment for Saturday after thanksgiving. I'm now being told my transmission is going bad (torque converter). I said that is not possible. A 2007 vehicle with only 117,000 mile and my transmission is going out. While sitting in the customer waiting area, a gentlemen with the same identical vehicle as mine told me he had more mile on his vehicle than mines, but his transmission went out also and he had to have his rebuilt for around $2,000. 00. I said there is no way transmission should be going out on a 2007 model vehicle with only 117,000 miles. Honda need to investigate if this is a defect issue. The service manager said no, Honda does not have a recall on the problem. Someone please help!.