Coming home from Whitby this aft, my Bravo decided to spoil its clean sheet of reliability. 
First thing I noticed was that, on putting my foot down in 6th gear at around 50mph, the car vibrated in much the same manner as it would when trying to accelarate in too high a gear. (Normally it'll pull quite happily at this speed in 6th)
The vibration lasted for the period the turbo took to build up to full boost, and once there the car seemed a little down on power and a whooshing noise came from under the bonnet.
After a bit of buggering about I managed to conclude that the vibration occurs in all gears, is most severe while boost is building up, and is still present but less severe once full boost has arrived. The whooshing noise seems directly proportional to the amount of boost the turbo is producing, i.e. noise builds up from when you put your foot down and stays constant once on full boost.
Driven on a light throttle (i.e. not making the turbo work too hard) the car still drives OK, still managing 52+mpg and no warning lights, smoke, overheating or anything. Can't see anything obviously wrong under the bonnet but then again much of it is obscured by that daft plastic thing on top of the engine.
So... my initial guess is that I've got a small split or crack in some hose/pipework in the pressurised side of the intake system i.e. somewhere between turbo outlet and the inlet manifold.
Anybody experienced anything similar?
All being well I'll be able to get hold of the fleet company tomorrow (bloody monkeys don't work weekends, useless ) and get it trailered off to Fiat, but it's always nice to give them a reasonably detailed diagnosis before they start taking the engine apart
First thing I noticed was that, on putting my foot down in 6th gear at around 50mph, the car vibrated in much the same manner as it would when trying to accelarate in too high a gear. (Normally it'll pull quite happily at this speed in 6th)
The vibration lasted for the period the turbo took to build up to full boost, and once there the car seemed a little down on power and a whooshing noise came from under the bonnet.
After a bit of buggering about I managed to conclude that the vibration occurs in all gears, is most severe while boost is building up, and is still present but less severe once full boost has arrived. The whooshing noise seems directly proportional to the amount of boost the turbo is producing, i.e. noise builds up from when you put your foot down and stays constant once on full boost.
Driven on a light throttle (i.e. not making the turbo work too hard) the car still drives OK, still managing 52+mpg and no warning lights, smoke, overheating or anything. Can't see anything obviously wrong under the bonnet but then again much of it is obscured by that daft plastic thing on top of the engine.
So... my initial guess is that I've got a small split or crack in some hose/pipework in the pressurised side of the intake system i.e. somewhere between turbo outlet and the inlet manifold.
Anybody experienced anything similar?
All being well I'll be able to get hold of the fleet company tomorrow (bloody monkeys don't work weekends, useless
) and get it trailered off to Fiat, but it's always nice to give them a reasonably detailed diagnosis before they start taking the engine apart 
