The CTO is a thermal vacuum valve and is located in the side of the intake manifold just forward of the carburetor. It blocks vacuum to the EGR Valve and the Evaporation Canister when the engine is cold. It begins to open at a nominal 115° F.
The CTO is a thermal vacuum valve and is located in the side of the intake manifold just forward of the carburetor. It blocks vacuum to the EGR Valve and the Evaporation Canister when the engine is cold. It begins to open at a nominal 115° F. |
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| Two drawings illustrating hose routing for the factory CTO. Note that one of the nipples is plugged. |  |