1994 Honda Civic • 13,000 miles

I just had my first full tune up at a Honda dealership, I wasn't experiencing any problems but thought it was time. Since I'm having problems when I shift gears and press on the gas the car doesn't respond, most times I have to let up on the gas cause it takes time getting up to speed. It never did this before and it's dangerous getting on highways where I need to build speed quickly. What could this be, the transmission? Engine problems?
May 8, 2013.

Sounds like an adjustment with the throttle pressure for the trans. Have them re check there work to make sure they did not disturb it