Having acceleration problems with my car. Trying to pinpoint what the probable cause is. Upon turning on the car the gas pedal is 'sticky', but once moving it's fine. Also, when driving on the highway or just trying to get up to speed in general, the RPM tends to jump from one to two, etc. Transmission fluid is pretty clean and full, and I have no lights on on the dashboard at all......Also of note, I had a spark plug misfire back in September, but it has not done this since. All help appreciated.