Problems With Boost At Idle

[getyayayaout]

I have an R33 gtst and up until a few weeks ago all was good. Now, when the car is idling the boost gauge shows a reading halfway between -7 and 0, when it always used to show -7. The same thing happens when shifting down, it never seems to drop below that halfway line and the car sort of just rolls...no real engine breaking or reverse thrust or whatever its called. When you're rolling in gear then open the throttle, the turbo lag is horrible. Any info would be much appreciated

[Swiper the Fox]

I have an R33 gtst and up until a few weeks ago all was good. Now, when the car is idling the boost gauge shows a reading halfway between -7 and 0, when it always used to show -7. The same thing happens when shifting down, it never seems to drop below that halfway line and the car sort of just rolls...no real engine breaking or reverse thrust or whatever its called. When you're rolling in gear then open the throttle, the turbo lag is horrible. Any info would be much appreciated

easy one...you have a air leak and/or you have lost compression.

do a cylinder comp test...if all good chase the air leak with a can of aerostart.

Edited January 3, 2010 by DiRTgarage