I have a Rover 45 impression, 51 reg. Most of the time when I am in 1st, 2nd and reverse gears they stick not allowing me to change and I have to stall the car to be able to restart and get going again. This happens in slow traffic and car parks where a lot of clutch control is required. Also it can take me up to 10 mins to get the car to idle, I can start it but as soon as I take my foot off the accelerator the engine cuts out. Last year we had a new head gasket, radiator, cam belt kit and spark plugs. Can you tell me what is wrong?