Walbro 450 Install (in progress)
03-13-2015, 09:00 PM
#31
I got the fill tube part. But isn't this the fuel pressure regulator right here? That silver thing next too the left of my flat head screw driver. It looks like it is just clipped in and can be removed. So yours didn't come with one?
03-13-2015, 10:04 PM
#32
Ya, the sock is just a pre-filter.
What does the metal thing with the hole in it on the side of the filter attach to?
Here's a filter I took out of an 04 returnless SUV module along with the 60 psi regulator(ball and spring) that was plugged into the port on the filter.
What does the metal thing with the hole in it on the side of the filter attach to?
Here's a filter I took out of an 04 returnless SUV module along with the 60 psi regulator(ball and spring) that was plugged into the port on the filter.
03-13-2015, 10:12 PM
#33
03-13-2015, 10:23 PM
#34
Its basically the same thing. Its inline with the fuel flow. Check out this thread. Its has some better pictures of it. I am pretty sure it is the pressure relieve valve. thread.https://www.performancetrucks.net/fo...-518129/page4/
"Electronic Returnless Fuel System (ERFS)
The electronic returnless fuel system is a microprocessor controlled fuel delivery system which transports fuel from the tank to the fuel rails. It functions as an electronic replacement for a traditional, mechanical fuel pressure regulator. A pressure relief regulator valve within the fuel tank provides an added measure of over pressure protection. Desired fuel pressure is commanded by the engine control module (ECM), and transmitted to the FPCM via a GMLAN serial data message. A liquid fuel pressure sensor provides the feedback the FPCM requires for Closed Loop fuel pressure control."
To convert the above to a return style system I just removed the regulator and plugged that port in the filter, added a bulkhead fitting to the module hat for the return line and a regulator at the rails.
Last edited by DrX; 03-13-2015 at 10:32 PM.
03-13-2015, 10:49 PM
#35
Yes, it's it's pretty much the same setup except with PWM control of the pump. It's nice if you can keep the venturi system. Then you don't have to worry how low the tank gets. On the module above it was driven by a small outlet on the bottom of the stock pump, so a Walbro pump upgrade meant loss of the venturi system.
"Electronic Returnless Fuel System (ERFS)
The electronic returnless fuel system is a microprocessor controlled fuel delivery system which transports fuel from the tank to the fuel rails. It functions as an electronic replacement for a traditional, mechanical fuel pressure regulator. A pressure relief regulator valve within the fuel tank provides an added measure of over pressure protection. Desired fuel pressure is commanded by the engine control module (ECM), and transmitted to the FPCM via a GMLAN serial data message. A liquid fuel pressure sensor provides the feedback the FPCM requires for Closed Loop fuel pressure control."
To convert the above to a return style system I just removed the regulator and plugged that port in the filter, added a bulkhead fitting to the module hat for the return line and a regulator at the rails.
"Electronic Returnless Fuel System (ERFS)
The electronic returnless fuel system is a microprocessor controlled fuel delivery system which transports fuel from the tank to the fuel rails. It functions as an electronic replacement for a traditional, mechanical fuel pressure regulator. A pressure relief regulator valve within the fuel tank provides an added measure of over pressure protection. Desired fuel pressure is commanded by the engine control module (ECM), and transmitted to the FPCM via a GMLAN serial data message. A liquid fuel pressure sensor provides the feedback the FPCM requires for Closed Loop fuel pressure control."
To convert the above to a return style system I just removed the regulator and plugged that port in the filter, added a bulkhead fitting to the module hat for the return line and a regulator at the rails.
