hi people iv recently brought a turbo cab which needs bits doing but cut a long story short i was driving normal & the car just stopped . when i lifted the bonnet i saw the cambelt had snapped so i pushed the car back home and today iv fitted a new belt and now its got a misfire (sounds like a scooby). have i fucked the head valves ? or is the timing out ? . its the first time iv ever did a cambelt and i think iv done it right any help would be grateful guys.