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scicala · 10-06-2019, 10:27 AM

The engine would still run OK with the power valve blocked until you put it under a load and get the manifold vacuum below about 7 or 8 inches of vacuum, then the engine would run leaner than required for good performance. Still driveable, but not optimum performance.

Sal

10-06-2019, 10:27 AM	#4
scicala Senior Member Join Date: Jun 2010 Location: Detroit suburb, MI Posts: 3,706	Re: power valve question The engine would still run OK with the power valve blocked until you put it under a load and get the manifold vacuum below about 7 or 8 inches of vacuum, then the engine would run leaner than required for good performance. Still driveable, but not optimum performance. Sal