Vacuum lines 94 SC - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-23-2007, 12:28 AM   #1
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Default Vacuum lines 94 SC

can some one either email me or post pics of the vacuum lines on a 94-95 SC
To include the fuel pressure regulator and bypass valve routings.
E-mail nx200t at yahoo dot com
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Old 02-23-2007, 12:32 AM   #2
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Posting your email addy on a public forum is a good way to be found by spambots that spend all day looking for that very thing.

I suggest you edit your email addy to: myaddy AT something DOT com.
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Old 02-23-2007, 06:58 AM   #3
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Screatta... Do you have the car? Some of the years had the vacuum diagram posted on the radiator support cover.

Hopefully that helps until someone can post a diagram. Afterall, posting will make it available for future searching.
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Old 02-23-2007, 11:59 AM   #4
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No I do not have the car. The engine is in my 89 reatta, it needed a bit more power
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Old 02-23-2007, 12:14 PM   #5
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We need to know exactly what car the donor engine came from. There are differences in fuel connections and vacuum connections even within the L67 communities.
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Old 02-23-2007, 05:53 PM   #6
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Best I can do. It'* a 94 Bonneville L67. Click on the picture for a larger one.
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Old 02-24-2007, 02:05 AM   #7
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the donor was a 94' park ave ultra. Thanks for the picture. It was verry helpful. just one question. What is the lower portion of the bypass valve connected to?
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Old 02-24-2007, 01:29 PM   #8
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Are you running the Buick PCM? If not, the valve won't do anything.

If you are, leave the bottom port open. It'* a vent. It used to have a small foam filter on it.

Keep in mind, the Buick didn't ever have a boost gauge, so it wouldn't have a MAP sensor like the engine pictured. That'* one difference vacuum routing that you'll encounter.
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