Hi all,

my vectra c 2.2 16v seems to be running quite badly, I thought i heard the timing chain make a horrible rattle the other day but the car has been running like poo before this happened, the car shudders as if im in the wrong gear and does feel a bit under powered whilst driving im thinking maybe the timing is slightly out I maybe wrong, what sort of symptoms will I get if the timing is out thanks

iv been looking at past forums alot say different things lambda sensor, egr valve , coil pack, can cause this engine shuddering symptom, with the cam chain rattling last week im in the dark not sure where to start