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High Pressure Valve Spring = less mileage?

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Old 09-28-2007, 05:43 PM
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Default High Pressure Valve Spring = less mileage?

Just replaced my 40,000 mile PRC dual springs with new PRC dual springs and noticed 1 mile less per gallon. Wondering if the new springs are responsible for lower miles per gallon.
Old 09-28-2007, 06:50 PM
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probably not.
but a heavier foot could be.




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