I've Taken My Marea For A Diagnostic After It Started Running Roughly. I Was Told By The Mechanic That Number 3 Injector Is Showing Up As Faulty Either Mechanical Or Electrical. Has Anyone Any Experience Of Removing Injectors On This Engine (i'm Having Trouble Locating Them) And Any Tips On Replacement , Checking Would Be Useful. Thanks For Taking The Time To Look At This.