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Help, Loosing Boost, No Apparent Hose Probs

iplen

By iplen,
in Engines & Forced Induction

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iplen Mentor

iplen

Posted
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As per the Topic, have an R32 that gets to boost, goes smokey (not willing to try too many times, but appears to be fuel smoke) as all Buggery, whistles a heap, and creates no power. First Panic reaction was a Turbo seal etc, but there is not any white/blue smoke, and it is only on boost the prob arises.

Second conclusion, Split in a boost line, have inspected them all and the seem ok, obviously a bit hard to do with it on boost, and do not have access to a Dyno just now, and I want my car back... Still investigating this, we have had the car running and sprayed Aero start around the I/C hosing to see if there is any audible change in note, and I am currently pulling it all off as there was nothing jumped out at us.

So, my question.. Is there a way to test Wastegates if I get them off the car, the theory being that perhaps there is an issue with the diaphram and boost is escaping that way? Or does anyone have any other suggestions? any tips much appreciated.

MrStabby Grand Master

MrStabby

Posted
Posted
As per the Topic, have an R32 that gets to boost, goes smokey (not willing to try too many times, but appears to be fuel smoke) as all Buggery, whistles a heap, and creates no power. First Panic reaction was a Turbo seal etc, but there is not any white/blue smoke, and it is only on boost the prob arises.

Black smoke = air leaking after being measured by the AFM

Whistle = air leaking under boost

AFAIK there's nothing to indicate a problem with the turbo.

So, my question.. Is there a way to test Wastegates if I get them off the car, the theory being that perhaps there is an issue with the diaphram and boost is escaping that way? Or does anyone have any other suggestions? any tips much appreciated.

Connect a hose to the actuator and suck on it - it should be airtight. No need to take them off. If you cant find a leak maybe try replacing any hose that's not in perfect condition. FWIW on my GTR a loose bolt on a vacuum connection under the plenum caused a leak.

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