Hi jeffsr & stevebfl, I replaced the spark plug wires this afternoon but with no luck, I also traced all the vacuum routes with a 124 service manual, they were all intact as well. BTW, what is dry gas? I also checked the spark plugs again, they are factory spec Bosch, I also tried platinum Bosch before, they are actually worse because of the smaller center electrode. I think I will be going back to the dealer next week unless miracle happens soon! Thanks