Question about 1987 Pontiac Firebird
Several things can cause this but start by verify the choke pull off which is responsible for opening the choke plate after engine has started.It will recieve engine vaccum once started and open to allow air into the carb. This is a vacuum dash pot/pull-off externally mounted to the carb with a linkage arm to the choke plate.Without this opening,the engine will be starved for air and put you into a full rich condition. Another external device wchich can mysteriously cause rich conditions is the canister purge valve. It can introduce raw fuel and vapor on start up when failed.It is a black plastic valve near the carb with small and large vacuum tubes.
Posted on Jul 19, 2009
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Posted on Jan 02, 2017
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