SUV is overloading on fuel

Hi and thanks for using 2CarPros.com.

The first thing I suspect is a faulty fuel pressure regulator allowing too much fuel to enter the engine. At an idle, the vacuum operated regulator receives its highest level of vacuum and may be controlling the pressure better.

With that being said, I suggest checking fuel pump pressure as well as the regulator. Here is a link that shows in general how it is done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Now, first locate the regulator on the fuel rail. Here are the manufacturer's specifications for fuel pressure:

FUEL PRESSURE
Ignition ON Engine OFF .................... 62-90 kPa (9-13 psi)

I have attached a picture of the regulator and components. With the engine off, remove the vacuum hose to the regulator to see if there is fuel in the vacuum hose. If there is, replace the regulator. The engine is sucking fuel through that line which could be the cause of the problem.

Do this and let me know what you find. If you have other questions or need help, let me know.

Take care,
Joe