Audi 200t: starting and fueling problems...

[Phil Payne]

> Problem is the actual starting. I am not 100% certain about the operation of
> the "lambda valve" on the CIS metering head, but the problem here is that it
> seems to be intermittent. Sometimes it buzzes, sometimes it doesn't. When it
> buzzes when the ignition is switch to the "ON" position, then the engine
> fires up on ignition. When it doesn't buzz, then it won't start.

Pull, dismember and clean the fuel pump relay.  Check for an immobiliser added using
"Scotchlok" connectors.  Check that the load reduction (X) relay is engaging with the ignition
on.

-- 
  Phil Payne
  http://www.isham-research.com/quattro
  +44 7785 302 803