Hi lad wot symptoms dose a falty map sensor have as i had a problem with my 3dr over xmass and we fort had sorted it well iv just had the car out for the first time in over 3 weeks and when the car comes on to about 20 psi of boost the car coths and bangs but will drive 100% up into 15/18 psi its onle when the boost starts to come after that it plays up

So could it be down to a falty map sensor ?????????