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SPRAY A LITTLE LUBE AROUND THE INTAKE BY THE GASKET IT WILL PROBABLY SMOOTH RIGHT OUT COMMON INTAKE LEAK PROBLEM.

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16y ago
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1mo ago

There are a few potential reasons for a rough idle on a new crate 350 engine in a 1992 Yukon. It could be due to issues with the fuel delivery system, such as clogged fuel injectors or a dirty air filter. It's also possible that there is a vacuum leak or a problem with the ignition system. Have a mechanic check these components to diagnose and fix the issue.

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Q: New crate 350 in 1992 Yukon idles rough when first started why?
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