The last I heard of the wind impacting the operation of an automobile was my old VW beetles when being passed by a semi. And what was impacted there was the direction of travel, not the engine. If so it would point to something in the air intake or air mass sensor or throttle actuator but whatever it is it's rare. I would learn how to read fault codes and start reading them - try a search. There should be something there - a 94 LH motor has reasonable good diagnostics. Presumably the dealer has been doing this but perhaps they were somehow blinded by your checkbook.