I have a vauxhall vectra 2003 1.8 sxi. I have recently replaced the clutch and gear box but now have one cylinder down as it is saying on the rac machine. It judders when we are at a standstill and starts first time. We had it for a while and then fixed itself and has gone bad again. Although no loss of power at all and the pressure in one cylinder has gone up and still saying that there is a cylinder down.
there is no loss of oil and no loss of water anywhere and the piston rings are fine as a camera has been placed down, I have also placed two bottles of valve cleaner into the petrol and this has done nothing. Some help would be brilliant as a bit of a stuck as no one seems to no whats wrong.