Slow throttle response Options

[kufor]

i'm new in here, so first of all "Hello everybody."

i just bought celica ST202 3S-GE (170hp) few weeks ago
on monday the first service visit has been completed:
change of timing belt, oil, oil filter, fuel filter, air filter and spark plugs also (NGK)
coolant has been checked and refilled, brake fluid too

unfortunately something got wrong, because the response to throttle is kind of slow comparing to what it was before the servicing
ECU reset didn't help

does anybody know what might be the issue please?
...or at least what to check before driving to toyota dealer?

[OOBE]

The car is too easy to work on. With the right tools, you could do pretty much all the maintenance required, except of course jobs requiring a machine shop. Save your money for something else. I've never taken my Celica to a mechanic and never will. If I get stuck, I have friends with more patience and wrench-turning experience than me that can help.