[N44183]

Long time lurker High mileage member here.

As the title says, it only happens under a hard wot extended highway pull. Wastegates hold vac fine-25 inches with no or barely noticeable leak down. However, when applying vacuum to the boost solenoid nipples (ones that lead to the vac. Canisters), it leads down fast. Car is off when using my vac pump.

Stock except the dinan stage 1 and 143k miles. I hear a rattle but it comes from the valve cover area.


Update:T'd into the wastegate lines with vac gauge, reads around zero vac at idle and rises to 17 inches vac on part throttle acceleration-the falls off to 8-10 inches when I go WOT.

Thanks in advance.

[N44183]

Bump for any suggestions.