I have a 82' 280zxt. What I thought was a leaking exhaust/intake gasket was just the peak of my problems. Now when driving in the car it will not accelerate past 55 from time to time. This is what is happening... When I am driving down the road and apply the gas the car will accelerate fine but then it will start to miss. If I really get on it, it is as if the motor is spinning but there is no pwer being produced. If I get off it and back on it some times it will accelerate normally. My dad thinks its a timing problem. I am good machanicly and would like to fix it myself to save money. If not it is going in the shop on Tuesday. Any help is appreciated.