Mk1 16v Hybrid
After travelling at high speed i came to a halt and my williams spluttered on pull off and puffed out loads of smoke but when i put my foot down smoke puffs out and the car seems to run ok at higher revs i got home and just let it idle but it just sounds soo rough its got new plugs, dizzy cap, rotor arm, coil pack, leads just had a gearbox rebuild now this can anyone please help me. And how much is an engine rebuild.