went to look at me new turbo today (im hope fully gunna buy it.) on the test drive, gave it big stick in second, changed gear, pop and a giant flame lol (it hasnt got a flammer) it also seems to do it alot when letting of in 5th. has just been set up by 'the phirm' its runnin 10psi on standard chip. will this constant back fireing damage the car?????

the bloke who mapped it apperently said the fuel may need turning down in a few weeks (said at time of mapping)