Sudden loss of boost pressure

[Richard E. Berlin, Jr.]

I'm running Ned Ritchie's IA III+ chip in my 81k mi. 20v
Avant, and it has been running flawlessly. But recently, I
have noticed a partial loss of Boost pressure ( from 1.8-1.9
to current 1.4) and the loss has been sudden, not gradual.
Aside from checking the turbo hoses I wonder if any of you
might recommend a check list of things I might try to
restore this sudden loss of oomph.
Am I correct in recalling a thread wherein this happened to
another lister not long ago? Was it repaired by replacing
the MAF sensor??

Any help or advice is appreciated.

Many thanks,

Richard E. Berlin, Jr
'91 200q20v Avant, Indigo/platinum, IA III+
(978) 548-3737
Home:(978) 526-9177
mailto:rberlin at feltonberlin.com