Any body have good data on the Yaris fuel system?

[CTScott]

The fuel pressure regulator is part of the fuel pump assembly. If you remove the fuel pump/sender gauge from the tank the regulators is pressed into the pump with and o-ring.

[LtNoogie]

Originally Posted by kurokoma-kun

From the Fuel manual...

"Injection volume: 47 to 58 cm3 (2.9 to 3.5 cu in.) per 15 seconds" (page 17)

To clarify my remarks in another thread: this works out to 212cc/min--using an online calculator to get max hp for this injector volume, I got 130.

Thanks for finding that. I guess I need to learn how to work those calculations for myself.

Originally Posted by CTScott

The fuel pressure regulator is part of the fuel pump assembly. If you remove the fuel pump/sender gauge from the tank the regulators is pressed into the pump with and o-ring.

That's not good for what I wanted to do but thanks for the information.

[kurokoma-kun]

Originally Posted by LtNoogie

Thanks for finding that. I guess I need to learn how to work those calculations for myself.

I wish I could learn how, but I am not good enough at math--as far as things like the max hp I have to rely on a calculator to give me the answer. If the numbers are off I never know why so I can't tell a good calculation from a bad one.

Even if I get the scientific concept or whatever, even if I memorize the steps to solve, the simple arithmetic takes me a very long time and the results typically don't mean a thing I'm kind of in awe of math geeks for whom the numbers make some intuitive sense.

Are you one of those freaks, Long? Then maybe you would like to d/l the demo of this--a sophisticated looking fuel injector calculator for windows.

http://www.performancetrends.com/Fuel_Injector.htm

[LtNoogie]

Originally Posted by CTScott

The fuel pressure regulator is part of the fuel pump assembly. If you remove the fuel pump/sender gauge from the tank the regulators is pressed into the pump with and o-ring.

I read practically the entire FUEL part of the service manual but never found a reference to the fuel pressure regulator being there. Do you have another source or did you find it by taking out your fuel pump assembly?

If the regulator is part of the fuel pump assembly, then I can never get any pressure out higher than what the regulator puts out, right? I was hoping that the regulator would be a standalone unit away from the pump that I could replace with an adjustable in-line regulator that could give me higher pressures under certain conditions.

Thanks for your thought on this.

[CTScott]

Originally Posted by LtNoogie

I read practically the entire FUEL part of the service manual but never found a reference to the fuel pressure regulator being there. Do you have another source or did you find it by taking out your fuel pump assembly?

If the regulator is part of the fuel pump assembly, then I can never get any pressure out higher than what the regulator puts out, right? I was hoping that the regulator would be a standalone unit away from the pump that I could replace with an adjustable in-line regulator that could give me higher pressures under certain conditions.

Thanks for your thought on this.

I got the info from TIS, as Cammell mentioned. Shoot me a PM with your email address and I'll email the newer fuel section.

I think you could pull the internal regulator and put your adjustable regulator in-line.