02 zafira 1.8 16v (125)bhp

My car is missfiring i have changed the spark plugs coil pack and new programmed ECU,, but the car is still missfiring there is no engine management lights on or anything im running out of ideas as to what it could be HELP please>????

daniel, March 2013

does it missfire when engine revved up or only at idle, have you removed coil pack and connected a plug to each lead and cranked engine to see if there is a spark? have you checked plugs for damaged electrodes? is fuel reaching the cylinders (faulty injector)? has a cylinder compression test been done? whats the coolant level, if its low where has the coolant gone? if its getting into a cylinder it will cause it to missfire when idling. these are just a few ideas good luck

RM, March 2013