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Old 12-29-2009, 12:02 PM
CasualGourmet's Avatar
CasualGourmet CasualGourmet is offline
Join Date: Oct 20, 2009
Location: Wilmington NC
Posts: 112
MC2150 Vacuum Line

Does anyone have a diagrahm for what the correct vacuum line hook ups are? Thanks!!
Let me rephrase that, one that works without the smog pump

Last edited by CasualGourmet : 12-29-2009 at 12:08 PM.
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Old 12-29-2009, 12:28 PM
brad_fsj10's Avatar
brad_fsj10 brad_fsj10 is offline
350 Buick
Join Date: Nov 11, 2002
Location: Pell City, AL 35128
Posts: 907
I posted the link to the best vacuum diagrams around yesterday...

Remove the T-fitting between the manifold vacuum source and the air pump, and route the vacuum line from the mainfold vacuum source directly to the top port on the CTO valve...
Brad Smith
79 J20
past rigs -
86 J10
80 J10
79 Chief
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Old 12-29-2009, 12:30 PM
dbuie dbuie is offline
Grease Monkey
Join Date: Jun 29, 2009
Location: Southeast NC
Posts: 398
Smog pump or Charcoal canister? On my '89 my smog pump hose goes to my air diverter valve and then based on engine temps, air is routed to the manifolds/cat. There are two valves on the diverter assembly. The top gets manifold vacuum and the bottom one is connected to a dual CTO on the back of the manifold. I have no vacuum lines from the carb going to the smog pump. The charcoal canister does have lines connected to the carb however.
1989 GW-Resto Project
My "Labor of Love"
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