Fuel Pressure Regulators and setting meters?

[cdydjded]

Our cars use what called a "returnless fuel system". The regulator is in the fuel tank, not on the fuel rail. It is not adjustable. You would have to convert to a "return" fuel system to be able to adjust your fuel pressure. Unless you are running a S/C or turbo you fuel pressure does not have to be adjusted, even with all the bolts on's available for our cars.

[Russelt3hPirate]

Originally Posted by cdydjded

Our cars use what called a "returnless fuel system". The regulator is in the fuel tank, not on the fuel rail. It is not adjustable. You would have to convert to a "return" fuel system to be able to adjust your fuel pressure. Unless you are running a S/C or turbo you fuel pressure does not have to be adjusted, even with all the bolts on's available for our cars.

hmm, converting to a return fuel system would be entertaining.

might as well gut the car, ligthen the wiring, and re do the ENTIRE fuel system while you're at it....

research time.

[LtNoogie]

Originally Posted by cdydjded

Our cars use what called a "returnless fuel system". The regulator is in the fuel tank, not on the fuel rail. It is not adjustable. You would have to convert to a "return" fuel system to be able to adjust your fuel pressure. Unless you are running a S/C or turbo you fuel pressure does not have to be adjusted, even with all the bolts on's available for our cars.

I have a S/C'd Yaris running tC injectors. The injectors are too big and the car throws a rich mixture CEL every time I start the car. I am thinking of getting a boost-compensated adjustable fuel regulator that I can turn down the psi until my data logger shows that the ECU is no longer struggling to trim back the fuel.

I expect that at my 6psi full boost pressure that my fuel pressure will go up 6psi and keep me at a nice AFR.