In need of vacuum - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-27-2005, 12:51 AM   #1
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vacuum diagram anyone? Im tryin to figure out where the damn lines run to. (off the vacuum ball)
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Old 02-27-2005, 05:33 AM   #2
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Isn't there a vacuum diagram sticker under the hood somewhere? Or am I thinking of our other car?
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Old 02-27-2005, 01:27 PM   #3
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You have to look several places in the service manual for vaccuum diagrams, the major users are the HVAC and cruise control systems. If your local library has a set of Mitchell Manuals I think they have sets of just vaccuum diagrams.
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Old 02-27-2005, 02:20 PM   #4
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no theres one to the transmission control and throttlebody which are both cracked and broken, but I cant see where they meet up.
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Old 02-27-2005, 04:57 PM   #5
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They meet up on the TB.. a vacuum distribution block.. has four ports [one blocked off if TEVES Braking System equiped], another to the cabin for the A/C vent thing, another to the Vacuum Modulator, and one more to the Charcoal Canister. We are talking about an LN3, right?


-justin
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