It has a K&N air filter installed. So it was possible some of the oil coated the mass air flow sensor so I checked and cleaned it and that had no effect. I suppose changing the plugs wouldn't hurt. The car has 27k miles on it. Also had a mech read any codes that may have cause an error but no codes appeared. my first thought is maybe some module linked with the computer may not be working properly. Northewest gas does use ethanol.
