Just wondered if any one could help. ive got a turbo 2000 x reg it seems to drive fine untill you put your foot down then it splutters a bit almost like a misfire or something ive had it for 2 years and not added any mods also it was serviced about 2 mounths ago could this be the coil pack breaking down and can you test it by the way no fault codes on ecu cheers gav

 

maf, pluds coil pack or air leak

 

Easiest check and first one is plugs, eg one fouled or wrong ones for your car/mods will not do the necessary underload/boost.

Mine did this and I changed boost solenoid, maf and coil packs as it had just been serviced so could not be plugs right!, wrong , subaru dealer had fitted the wrong plugs lol

But each problem can be different, hope you get it sorted