5ktq electrical issues update...
audi at humanspeakers.com
Thu Oct 2 01:57:16 EDT 2003
> Quantity and quality of spark seems perfect
> or at least as good as it needs to be. What is confusing me is the
> fact that when the engine is missing its dumping black smoke and
> showing every sign of being rich except the O2 sensor reads as ever
> so slightly rich at about 5v at idle with it tuned for a slightly
> richer 5.5v at idle.
A miss results in unburnt fuel making things look "rich," but also
leaves oxygen in the exhaust stream provoking your OXS to register some
O2. So it can be confusing.
You need to figure out if it is *really* "missing" somehow...
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