bought another coupe but it had a blocked injector so my mech replaced it ( with a injector off a non turbo car- is this ok) so when i first start my car it sounds like its misfiring and poppin when i rev it,but i can rev it freely all the way to the redline.i leave my car to warm up and the sound goes but the car doesnt have much power,the turbo kicks in but then fades away after a short time.. some1 please help!!!!!!!!!!!