If it's a part of the digital display in the center of the instrument panel,
that is your manifold boost pressure. If it's only reading 0.1 or 0.2,
you've got some serious boost leaks (your car has a turbocharger, right?),
or the hose to the Engine Control Unit to the right of the passenger's feet
is disconnected or the pressure transducer in the ECU is busted, or ???.
Normally, it should read in the vicinity of 0.7 or 0.8 while cruising, and
up to 1.4 with a stock engine management chip and wastegate spring, and 1.8
or more in modified form.
You can order a new owner's manual from Audi (ask your dealer), or get a
used one on eBay - and look for a Bentley manual as well.
1987 Audi 5kTQ - 5000CD with sport seats and Fuch rims on the way!!!
1980 Audi 5k - 5000S returning to stock form
1962 and '64 Auto Union DKW Junior deLuxes - returning to the road this
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