I know when I turn the starter if it lags and doesn't start up right away, it's not worth driving. To drive it is like pulling, tugging and forcing the engine to turn over. There will be very little power in accelerating and it sounds like its backfiring as it drives. What can be wrong with it. I want to take it to the dealer to get fixed. But everytime I do they find everything else wrong but the problem at hand. I get it back home and it rides for a little while and later I'm right back where I started. ANY ideas of whats wrong. I appreciate the help. Thanks