I own a beatuiful car but at times it wont respond to the gas pedal the eng. stays at idle it has become a safety problem when needing to take off in traffic. The dealer has had the car 8 times and could not find the problem they said we had to live with the problem because the factory is not useing this 3500 eng. any more so wont fix problem does any one have any suggestions for cure? they say tenn. does not have a lemon law.