Hi all...my first time here. I bought a 95 Z28 recently with 80,000 miles on it. Car ran well, except for being a little sluggish at lower rpm's. I took it yesterday to have a new fuel filter put on and the entire fuel system cleaned. The car ran much smoother when I picked it up, but today it wont start at all. It used to start on the first crank every time, until the work was done. Could they have done something wrong? I there something I can check before I have to have it towed? thanks in advance for any help.