I have been busy all day taking the EGR and inlet manifold off for a clean, whilst I was in there I installed a blanking plate for the exhaust side of the EGR pipe and put a new OEM air filter in.
All well and good (so far) but when I took the car for a run earlier I got a shudder when I switch the engine off, thinking it maybe a fault I tried it again and the same happened.
Does anyone have any idea what this maybe? Seems like a bit of over run??