Hi first post here so please be nice :-) I have a 1600 ecotec zafira with 20000 miles on the clock, it is driven sedately by my other half and caned by me! The problem is that it has started missing occasionally. It doesnt matter whether the car is hot, cold, under load, or not it will just start to run rough or sound like it is running on 3 cylinders it also loses power when it happens, but it never stalls and there is no error lights on the dashboard I have tried multiple basic fixes but I now need more help on what to do next, So far I have Changed the fuel (from Morrisons to Shell Optimax) Changed oil (10/40) Checked and changed spark plugs checked the air inlet and filter were clean and I have revved the Knackers out of it to ensure it is not a sticky valve
Where do I go from here? And thanks in advance