Aeromotive Fuel Pressure Inconsistency Part 2

Rusty Davenport · 03-31-2016, 08:39 AM

For clarification this may help......the fuel pressure always holds steady once the engine is started until it is shut down.......it never restarts at the same pressure but it holds at whatever it starts at, there is no fluctuation while running. Set at 6 while running and holds forever until shut down that is great.... BUT it will restart with more or less fuel pressure and hold until readjusted or shutdown. Checked the voltage, the vent, the fuel is dumping on foam and the fuel cell is kept full. Open to any and all help. I am running a filter before the fuel cell and another a couple of feet from the carburetor. The Aeromotive gauge at the carb always agrees with the Autometer on the cowl. Thanks for any comments. Interesting note......Aeromotive told me I didn't have a problem-----really ???

Sean Marconette · 03-31-2016, 10:08 AM

Rusty,

I reread your other post so I hope I did not miss something there. Explain your layout and where the pump,regulator and cell are along with fittings and line sizing. The reference port on the regulator diaphragm is open to atmosphere right? If this is plugged or blocked that could play a role as the regulator warms and cools it will change your setting.

Sean

Bob Mulry · 03-31-2016, 07:42 PM

The fuel return should not be dumping on the foam...

The return should be submerged so the returning fuel does not cause foaming..

Kevin Panzino · 03-31-2016, 11:01 PM

Could be an instrument hysteresis or "stiction" issue and nothing more.

03-31-2016, 08:39 AM	#1
Rusty Davenport Senior Member Join Date: Jun 2005 Location: Nashville N.C. Posts: 506 Likes: 4 Liked 101 Times in 27 Posts	Aeromotive Fuel Pressure Inconsistency Part 2 For clarification this may help......the fuel pressure always holds steady once the engine is started until it is shut down.......it never restarts at the same pressure but it holds at whatever it starts at, there is no fluctuation while running. Set at 6 while running and holds forever until shut down that is great.... BUT it will restart with more or less fuel pressure and hold until readjusted or shutdown. Checked the voltage, the vent, the fuel is dumping on foam and the fuel cell is kept full. Open to any and all help. I am running a filter before the fuel cell and another a couple of feet from the carburetor. The Aeromotive gauge at the carb always agrees with the Autometer on the cowl. Thanks for any comments. Interesting note......Aeromotive told me I didn't have a problem-----really ??? __________________ NHRA AND IHRA STOCK ELIMINATOR 2772

03-31-2016, 10:08 AM	#2
Sean Marconette Senior Member Join Date: Mar 2006 Posts: 977 Likes: 797 Liked 275 Times in 76 Posts	Re: Aeromotive Fuel Pressure Inconsistency Part 2 Rusty, I reread your other post so I hope I did not miss something there. Explain your layout and where the pump,regulator and cell are along with fittings and line sizing. The reference port on the regulator diaphragm is open to atmosphere right? If this is plugged or blocked that could play a role as the regulator warms and cools it will change your setting. Sean __________________ Sean Marconette 84 Mustang 5060 SS/N Last edited by Sean Marconette; 03-31-2016 at 10:15 AM. Reason: More info

03-31-2016, 07:42 PM	#3
Bob Mulry VIP Member Join Date: Apr 2002 Location: Coarsegold, CA Posts: 1,016 Likes: 57 Liked 320 Times in 102 Posts	Re: Aeromotive Fuel Pressure Inconsistency Part 2 The fuel return should not be dumping on the foam... The return should be submerged so the returning fuel does not cause foaming.. __________________ Bob Mulry 7516 STK A & M Motorsports

03-31-2016, 11:01 PM	#4
Kevin Panzino Senior Member Join Date: Oct 2002 Location: Pittsburgh Posts: 578 Likes: 298 Liked 756 Times in 139 Posts	Re: Aeromotive Fuel Pressure Inconsistency Part 2 Could be an instrument hysteresis or "stiction" issue and nothing more.