Torturedglitch

http://www.pistonheads.com/sales/2945011.htm this is the link to the car there is a pic on there and the spec is: Zisco exhaust manifold Jperformance exhaust decat back heat wrapped to back box Hybrid ct9 with decat pipe runnin 0.8 bar boost. ( New from Dec) Aircon removed (still have air con if buyer wants to refit it) Relocated Air filter HDI intercooler kit Bailey Dump valve Die hard battery Walbro 255LPH Fuel pump. Fuel regulator HKS fuel cut defender Magnetic Sump plus im really worried hope i havemt bought a lemon

hey guys ive just bought me a glanza today it is a lovely car from a kid in devon on the way home it was raining and i went to over take a car booted it it boosted but then it started backfireing and it was like the turbo dropped all boost and then back to normal when i backed off, scince then ive been out in it in the dry and it is still doing it not everytime just wen i really boot it, it seems. im told the car has hybrid ct09 front mount intercooler external waistgate and coupple of other bits and bobs, the turbo and engine both work brilliantly apart from this problem any help? p.s im new to this and this is my first turbo car so be gentle, ill get sum pics up tmrw