Engine Performance problem
1991 Audi 80 4 cyl Two Wheel Drive Manual 267879 miles
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i have audi 80 model my problem start after I change set of ringes of the cyl , comsuption of gasoline increse with formation of black smoke it comsupt about ( 1 LT per 8 Km ). i open the Carburetor and clean it but with out benefit.
please for your advice.

Hi entist,

Sooty spark plugs means too much fuel is getting into the cylinders or the combustion is incomplete.

1. Is the automatic choke is opening fully?
2. Is the valve timing correct?
3. Are there any vacumn leakages?
4. Is the igniton timing correct?