can you please help me with my corrado 20L 16v. ive only had it 4 months, my problem is sometimes when i go 2 accelerate the engine doesnt seem to respond or rev and feels like its going to stall but doesnt and then adventualy picks up speed and has loads of flat spots. i had it serviced on the 15th and cam belt done its been worse sence then. does any one have any ideas please.