I brought a 2001 250gt about a month ago, didn't have as much power as i thought it would and after running a full tank through it i found it had really rubbish fuel economy, striped the plenum and swirl valves and cleaned them, cacked with buildup, and has been running like gold ever since, the change was drastic. i wounder how many people have rubbished these cars simply because no one ever maintained them properly.