Just spent an hour going over everything and tightening stuff down. The air leak seems to be gone (for now), but, since I took the nuke-it-from-low-orbit approach and checked / retightened
everything, it's not 100% clear as to what was actually causing it. Throttle response is noticeably improved, however, and soot at cold startup seemed reduced.
The finger is currently pointed vaguely in the direction of the 10mm nuts holding the manifold adapter to the manifold; the ones nearest the engine had backed out slightly. However, I also loosened and re-tightened a number of clamps, re-seated vacuum lines just to be sure, etc., so it could have been down to any one or a combination of factors.
For my future reference:
hopp wrote:
I see you have the weeks kit. Did you make sure intercooler hoses are engaged up to the indexed stops on the CAC? When I installed my kit there was a bit too much oil on the inside surface of the hoses and they slipped down causing an air leak under boost at 2k+.
Both appeared to be clamped correctly at both ends, and indexed as intended. No splits that I could find, but I do plan on replacing them with silicone hoses at some point. Holding off on doing them until after I can get the Provent that's sitting here installed.
WWDiesel wrote:
Quote:
Have not yet pulled the manifold adapter to check that the RTV is still making a good seal.
Most likely!
And a leaking or loose boost hose usually will just blow off connection!
Entirely possible. Decided to not go the whole hog and yank the adapter as I don't have the gasket on hand, but given the backed-out nuts it's a definite suspect. Going to drive it for a few days and see if anything changes; if it does, that will be my first port of call.