Hi guys wondered if anyone could help with this problem.Is a 98 GT wth 4.6L auto,It fires up and idles very good and will accelerate just fine up to about 1/4 throttle then engine bigins to hesitate( like a misfire on a cylinder).It seems to me it is a bad plug wire or plug, i have checked plugs they "look" fine and have ordered new wires.Just curious if there is any other possibility that is common or not.I also cleaned the mass air with a spray of carb cleaner and carefully reassembled that.It did sit for 4 years without running and had some old fuel left in the tank,i drained most (90% or so ) and added fresh.Also had to install a new fuel pump it is working fine.I will replace fuel filter soon it just wont come off on the outlet side and will have to have another try at it ..grr.Car has been driven maybe 15 miles /35km or so since i brought it back to life. suggestions-ideas ..TY