At the expense of hurting some feelings, here goes. First, I agree with 73AbodEE; Nobody messes with my stuff. I help a LOT of people with their stuff, but I always refuse offers of help from others. When I need an extra pair of hands, I get my wife to help me. (she is actually a pretty good helper). Second, why on earth did you drive it when it was running so poorly? It doesn't matter that you think this guy knows more than you. If the car WAS running fine and suddenly runs like CRAP, don't drive it. Tell the other guy thanks, but no thanks; put it back like it was. There is plenty of blame to share here, but the bottom line is that if the car WAS running fine and suddenly ISN'T, don't drive it.
