200TQ - no overboost

[quk@isham-research.demon.co.uk (Phil Payne)]

Spent some time on Roger's 200TQ yesterday evening.

As far as I can see, everything is functional.  The WOT switch is new
and the WGFV is being driven by the ECU.  It also passes the MityVac
tests, and a boost gauge shows that the top chamber of the wastegate
is being fed 2-5 psi all the way to redline.  The wastegate diapraghm
holds vacuum, as do all the other lines.  The hoses are a type I
haven't seen before - unbraided and thick-walled, much like the fuel
hoses I use to replace Audi stock braided hoses - but a true 3.5mm ID.

Just about every component (including the turbo) is original.  140k
miles.

However - flooring the accelerator at 35mph in third delivers only a
_slow_ boost accumulation, eventually reaching around 8psi.  The climb
is the most gradual I have seen on any MC/MB engine.  No overboost at
all.

Any ideas?

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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