The car seems to have next to no power on full throttle and seems to labour at idle. On top of this the exhaust seems to be blowing rather than flowing. I have alredy changed the ignition leads and was wondering if a new timing belt and spark plugs would help. Neither of them have been changed since i owned the car which had 27k on it. i can also say with utmost certainty that it needs an oiland filter change which i shall be doing soon.