Ain't that what they are supposed to do ?  Keep it steady as outside pressure diminishes ? Doesn't your gauge suffer from the same diminishing outside pressure as altitude increases; therefore, wouldn't they stay constant, if working properly ? 'Splain to us simple minded, of which I may be the only one.

jofarr

----- Original Message ----- From: Ed Anderson

 

I agree with your statement, Buly.  Ideally if the pressure differential between fuel rail and manifold is kept constant by use of a manifold reference then that would imply that the fuel pressure should vary to compensate for different manifold pressure.  However, my fuel pressure is rock steady and this is the second manifold-referenced fuel pressure regulator I have used with no difference.  So either my manifold-reference fuel pressure regulator isn't or I am misunderstanding what they are suppose to do.

 

But, that is my experience.  How about others of you flying what is your experience with fuel pressure???  Does it vary? The variance corresponds to what??