I have the timing belt changed on my 2001 Honda Civic EX two weeks ago. Right after the timing belt change I noticed that the car was more sluggish and did not accelerate as fast as before. Three days ago the car started losing power occasionally, especially when it was just starting and low speed. I could regain the power after about 30 second, and then it was fine. Could this be related to the timing belt change? If so, I should get the dealer mechanics to fix it for free, right? Thanks!