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bpu699 bpu699 is offline
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Join Date: Apr 2007
Location: wisconsin
Posts: 2,539
Really nice description . Thanks for the detailed response.

So falure of the frequency valve CAN cause a lean or rich condition based on what you just posted. That would make sense, as it can effect control pressures.

So how does he check the frequency valve for function? Is the fact that its buzzing mean that its working?

Sounds like removing it would lower control pressures, lower the amount of fuel being returned to the tank, and increase fuel flow to the injectors.

This begs the question, if all of the above is true, why haven't people gotten rid of the valve in their search for more fuel flow?

Seems way easier that modifying the fuel head...

Old 11-18-2014, 08:16 AM
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