Installing AFPR
#1
Installing AFPR
I recently installed a turbo kit in my '96 miata. I changed the stock fuel pump with a fuel pump from a RX7. The only problem i'm having no that the engine is to lean, and i don't know if it's because of mine APFR i installed. I installed it between the fuel rail and the fuel feed line, but the stock fpr is still installed, because when i took it off the fuel rail, it didn't even start. Does anybody know what i did wrong or what i need to fix??? thanks in advance
#3
Boost Pope
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Fuel pressure regulators work by causing a restriction to the flow of fuel through them.
In a recirculating fuel system, any fuel pressure regulator must therefore be installed after the fuel rail, between it and the return line.
If you install any fuel pressure regulator between the fuel rail and the supply line, then the regulator will cause fuel pressure at the rail to decrease as the regulator's reference signal rises.
The correct scheme for installing an AFPR on a '90-'97 Miata is:
Supply line -> fuel rail -> stock FPR -> AFPR -> return line.
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