Fuel Pressure

[aDC10mech]

I have a 2005 Tahoe with the 5.3 in it and was wondering what the fuel pressure should be..

thanks for the help...

 

[MO Viet Vet]

If I am not mistaken the idle pressure should be 50-55 psi and when throttle should be closer to 60 psi and then drop a little when maintain a cruise speed rpm. Make sure fuel filter is freshened every now and then, every 30k is my choice. When you shut off the engine the pressure should not bleed off.

 

[aDC10mech]

Thanks, I think the fuel filter is in the tank on my Tahoe but not sure.

 

[MO Viet Vet]

There is a separate listed inline fuel filter at Rock Auto.

 

[aDC10mech]

Did it happen to say where it is located? I have looked and can not find it. Online research say 2004 and up are in tank..

 

[MO Viet Vet]

Some of the notes at Rock Auto may shed more light but I didn't check that. You may have just the filter in the tank if there is not one in line anywhere.

 

[30backs]

What is the fuel pressure suppose to be on 03 Tahoe 5.3 flex fuel?

 

[MO Viet Vet]

Same as the first response to the thread

 

[30backs]

Ok thank you. I was thinking their was a difference between flex and a regular motor.