Misfire - Hesitant Accelerating On - St185 Advice

[mad1969]

i'm having problems with my 185 runs fine for about 15/20 mins holds boost pulls well though the gears then all of a sudden the boost drops of 2-3 psi and the cars holding back

iv check all the boost pipes all seem ok apart from the main air filter hose that fits onto the turbo its got a split iv tape it up and check it when the car is running and carn't see feel and air escaping

[GTForbes]

seal the air filter hose with some gaffer tape and check your plugs and leads, misfire on acceleration when warm is usually these failing