Quote Originally Posted by bigmarkc View Post
I have a yr 2000 GU with a ZD30 DI which has developed a whistle from the turbo.More noticeable when cold and seems to only have a slight whistle when warmed up.Doesn't seem to affect power though.I wonder if a scan for fault code would show any problems ?
Mark.
My work car is the exact year as yours and exact problem. Ended up being the intercooler the first time and now its come back again.

Havent had a chance yet but I'll check mine this weekend. Stops after warming up but more noticeable when cold too.