car has started to play up over the last 2 days it will randomly judder. feels like a light misfire. when i come onto boost it will judder then after about 4/5 seconds it will be fine. no fault codes/EML going to start with replacing the plugs (done about 12K on current plugs bosch super 4's) engine: AGU with it being xmas haven't got a massive amount of spare cash at the moment. so don't want to go replacing random bits for the sake of it. been looking around online seems like the ignition amplifier seems like this comes up alot when searching for misfires on the 1.8T lump. would this be a good place to start after plugs ?