tried everything on my tigra 98?

well were do i start tigra has dropped down on 3 cylinders not all the time tho yes there are sparks from the plugs etc..i have changed the following coil pack egr valve cam sensor air temp sensor map sensor injectors you name it i have proberly changed it. the dionostics show that there is no fault in the engine yet the light is on (engine managment) the car is seriously over fueling so much so that it has drank £20 and its only been round the block once!! it wont stay ticking over i have to keep the pressure on the accelarator for it to do so i havent been driving it for obvoius reasons also they dont make a manual for one so things are hard enough trying to find were parts go. so some one please help as the people i speak to dont have a clue thsank you.

ellie hannam
February 2009