Hi to all FFOC afficionados, I'm new to this forum business, so bear with me if I don't use some of the latest technical jargon - I prefer to speak plainly. I wonder if there's anyone out there who owns or uses a 2.0 litre TDCi C-Max - mine's a Ghia, but that's probably not relevant to the issue at hand. Unmodified, '04 plate, same as it came from the factory, except now 25,000 miles old. The problem I have is that I can detect a transient engine vibration through steering wheel and pedals at about 1700-1800 rpm, perceptible in most gears, but most noticeable in 4th, when going throug