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Needing more info for a complete answerChevy didnt build a Tahoe in 1986. If you are refering to the full size Blazer K5 or K10, the carb would likely be a Rochester Quadrajet with computer feedback/emissions solenoids.

it really doesn't matter what vehicle the carb is on the correct air fuel mixture is 14:1. 14parts air to 1part fuel. also Chevy built a s-10 with a Tahoe package in 86

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Q: What is the correct air to fuel ratio on a 1986 Chevy Tahoe carburetor?
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