Re: 70 GTO question
Official documents show 233 and there were also dealer installed units. I bet the total is less than 270 but that is my guess only.
They have a vacuum can between the manifold's vacuum source and the switch and they have a check valve between the manifold vacuum source and the can. The can is evacuated and then the check valve keeps the engine's loss of vacuum (increase in pressure) from affecting the actuator and letting it go back to normal mode. As long as the can is evacuated and you have no leaks in the system, they stay open. I have pulled a vacuum on these and let them set overnight. The next day, they are still wide open so the system works pretty well.
Tom
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03-12-2006, 07:37 PM
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