Filling the air intake with gas

2005 FORD FREESTYLE
179,539 MILES • 6 CYL • 4WD • AUTOMATIC
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CHRISTINA
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  • 2 POSTS
I have the vehicle listed above and it is filling the air intake with gas. what could cause this? i have replaced the fuel pump, injectors, fuel rail presher sensor,mass air flow sensor and throttle body and it is still doing this.
Jun 6, 2020 at 9:21 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good afternoon,

The fuel pressure regulator is on the fuel rail. It has a vacuum line attached to it. Remove the vacuum line and turn the key to the on position. See if any fuel shoots out the line from the regulator. It is common for the regulator to fail and cause this issue.

Roy

The fuel pressure regulator is attached to the fuel rail downstream of the fuel injectors. It regulates the fuel pressure supplied to the fuel injectors. The regulator is a diaphragm-operated relief valve. One side of the diaphragm senses the fuel pressure and the other side is connected to the intake manifold vacuum. Fuel pressure is established by a spring preload applied to the diaphragm. Balancing one side of the diaphragm with manifold vacuum maintains a constant fuel pressure drop across the fuel injectors. Fuel pressure is high when engine vacuum is low. Excess fuel is bypassed through the fuel pressure regulator and returned through the fuel return line to the fuel tank.
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Jun 6, 2020 at 1:16 PM
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CHRISTINA
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Okay, I changed it now it's not flooding anymore, but it's not wanting to start.
Jun 6, 2020 at 3:03 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
You will need to remove all the plugs and crank the engine until all the fuel is out,

Squirt a little oil into each cylinder to get back compression from the wash don from flooding.

Then replace it with new plugs.

Roy
Jun 6, 2020 at 3:06 PM
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