H&S Fuel Flow PID - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 05-30-2013, 02:50 AM Thread Starter
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H&S Fuel Flow PID

ust for grins I decided to checkout some of the other PID's on my 2008 6.4 CCSWB FX4 and now am thoroughly confused

The "Fuel Flow" PID is measured in units of GPH(gallons per hour)per the Black Maxx but either I am really stupid, don't confirm that statement, or GPH is NOT the unit the PID is actually indicating or it is monitoring fuel flow from the HPFP(which I don't know why that would be a useful PID to monitor). Cruising at /- 70 mph, on mild tune and at /- 1800 RPM the unit indicates I am at /- 28.0 GPH. This is impossible(if it is consumption flow), again don't confirm I am eat up with the dumba$$. I average around 18.5 MPG, hand calculated so my consumption should be in the neighborhood of 3.78 GPH. Quite the difference.

Can anyone shed some light on this ?
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post #2 of 4 Old 05-31-2013, 03:15 PM
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I believe it is reading the amount of fuel being supplied by the lift pump on the frame. Most of the fuel is later returned to the tank.

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post #3 of 4 Old 06-03-2013, 03:00 AM Thread Starter
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Quote:
Originally Posted by countryraised View Post
I believe it is reading the amount of fuel being supplied by the lift pump on the frame. Most of the fuel is later returned to the tank.


What would be the point in monitoring this parameter ?
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post #4 of 4 Old 06-03-2013, 04:42 AM
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To verify lift pump health
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