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1992 Audi 100 cs has rough idle and popping noise in the exhaust what can cause this?
Wiki User
∙ 12y ago
When was the last time you changed your O2 sensors? They are supposed to be changed about 60,000 miles. Could be responsible for rough idle and popping in the exhaust.
Otherwise it is likely a vacuum hose that is leaking.
Wiki User
∙ 12y ago
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