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Q:

floods out on cold start on 1992 Chevrolet S10 Blazer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
black smoke until I hit the throttle
(1) Answer
Coolant temp. seneor out of range, or fuel seepage from injector 'spider' assem. after engine shutdown.
Scan (live-data) test and fuel pressure/leakdown test needed! Light on?