Mate of mine has two small turbo escossies and has had them chipped by a well known tuner to 285 ponies. One car is fine and the other smokes.

The car only has 20k on the clock. We were gonna start swopping bits between cars to try and eliminate the problem. We've already checked the chip is seated correctly.

now somewhere i read said it could have been the MAP sensor, but can't find the article to confirm.

Any ideas would be greatly appreciated.