Mazda Other

I have a 1985 Mazda GLC sedan with 135K on a 4 cylinder engine. It will not idle when the air filter, or even the filter cover is in place. It runs fine with neither item on the carburetor. I think the air/gas ratio is off, but where is the adjustment made at on the carburetor? Is there a diagram showing the type of carburetor in question that I could look at?
Thanks in advance.
B. Kracht
Betty Kracht
June 17, 2007.

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