Fuel Pressure Regulators and setting meters?

[cdydjded]

OK here is a list of parts:
Fuel rail (Perrin)
Adjustable fuel pressure regulator (AEM, Aeromotive)
-6 fuel lines (any brand)
-6 fittings (any brand)
Fuel pressure gauge (any brand)

[Russelt3hPirate]

Originally Posted by cdydjded

OK here is a list of parts:
Fuel rail (Perrin)
Adjustable fuel pressure regulator (AEM, Aeromotive)
-6 fuel lines (any brand)
-6 fittings (any brand)
Fuel pressure gauge (any brand)

hmm interesting.

[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.

[cdydjded]

LtNoogie: you are correct that your injectors are to big. Our stock injectors are in the 190-200cc range, TC injectors are in the 350-370cc. The most you can go up in injector size without driving the computer crazy is 20%. That would be in the 230-240cc range. I feel that by adjusting your fuel pressure to compensate for running too big of an injector will not help. It would be better and less expensive to buy the correct injectors than converting to a returnless fuel system.