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Rough idle P0103 and P0400

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Old May 31, 2026 | 07:47 AM
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Rough idle P0103 and P0400

Trying to identify the black tube (not connnected) in the picture. It's on the back of the manifold on the passenger side. Has blue mark on the end of it. Wondering if it's a vacuum line and if so, where does it connect to?

 

Last edited by Justahockeyfan; May 31, 2026 at 07:59 AM.
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