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Old 08-06-2020, 03:46 PM
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tkinion tkinion is offline
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Default 1970 GTO 400, TH, non-air, Vacuum Hose Diagram Needed

My Chilton's doesn't have it, any help is greatly appreciated!

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Old 08-06-2020, 08:24 PM
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tkinion tkinion is offline
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Or can someone tell me if the front vacuum line near the fuel intake goes to the transmission and the rear vacuum spits to the distributor and brake booster?

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Old 08-07-2020, 06:16 AM
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Yes and yes.



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Old 08-07-2020, 04:18 PM
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From factory the rear splits to brake booster and the TCS solenoid and from the TCS solenoid to the distributor.
If you no longer have the TCS system working you may bypass the solenoid, then youŽll have 20° added timing from the vacuum advance wich is not the case with the TCS system.
With TCS youŽll have vacuum advance only in high gear or with cold or too hot engine.

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