Since i dont know what is happening to my car when wot it sort of losses power then gains it back losses power then it gains it back it's like pulling back, so ive decided now that i really need a scan tool. wich one would give me all the info and is the direct scan easy to work wit.? i do have a lap top and i only drive car car if even in the weekends and on the track. wich one would be best and who gives the best prices. i do have a lap top for the direc scan. thanx in advance