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Why does your 1977 K30 sputter?

Updated: 8/17/2019
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14y ago

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I have an 88 1500 GMC 350 throttlebody It does the same thing, I have tried any number of things including changing the computer. Nothing helped, however I kept driving it and found that I get 7 more MPG

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14y ago
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Q: Why does your 1977 K30 sputter?
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