Thread: Terrible milage
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Old June 15th, 2022, 01:43 PM
James James is offline
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Default Re: Terrible milage
I'm running a 78 main jet size with a 45 power valve in my 305 V6. I am getting 14 mpg.

My thought:
Have you replaced your power valve? If the diaphragm is leaking and/or its gasket is split more fuel is added to the engine.
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