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extreme lack of oomph in 5kCST

In message <v03102800b015723efc87@[]> Brett Dikeman writes:

> OK, big problems...

a) Check wastegate diaphragm by seeing if the top chamber will hold pressure
   or vacuum.
b) Pull turbo --> intercooler hose and check for metal filings.  NOW.  Loss
   of the impellor securing nut caused this behaviour in my car.
c) Check and/or service WOT switch.

d) Check brown wires grounding engine block to ECU and dashboard.  
Is the fuel metering head original?

 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club