Update on loss of power/backfiring into the intake Audi 5000....

[Stephen Ankney]

Listers,
Spent a couple of more hours digging through the engine bay...

Removed and checked intake boot for leaks/cracks. Found none. I also ran th=
e
car at idle and wiggled all vacum hoses and intake boot to see if I could
get the engine idle to change. Nothing...

So I disconnected the O2 sensor leads to see what difference that made and
the car runs darn near perfect! I now get the mandatory check engine light
and O2 fault code but the car runs good. I think that my O2 sensor must hav=
e
been pretty dead. I ran the car for about 20 minutes and it did not stumble
once with the O2 sensor disconnected...

So here's my next questions: Is it OK to run the car for a few days around
town with the O2 sensor disconnected? What would be the pitfalls of doing
so? Bad gas mileage I'd assume...? Car running rich?

Does it sound feasable for a dead O2 sensor to cause backfiring into the
intake like so...?

Thanks again everybody!
Steve
88 5000S
Michigan




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