jack225hills

Just brought my first 1.8t, had it for about 2 weeks now.. Driving along, I get the urge to have a little blast, no boost...... 5 mins later I get the same urge and it's boosting perfect fly fine. Any help would be appreciated on what to do....
Also was on the motorway and gave it a little blast and my DV just kept dumping and I was loosing all pressure...

Sorry if I have been vague

Thanks