FIGURE 1-1
Figure 1-2 is typical for single fuel rail engines equipped with both inlet and outlet ports. Multiple fuel rails may also be
plumbed in this fashion, either “in series” or “in a horse-shoe”. Note: Multiple fuel rails are always best plumbed in
parallel (as in Figure 1-1 above) for best flow and pressure control.
FIGURE 1-2
10. Once the regulator is installed, attach a suitable fuel pressure gauge to the 1/8 NPT port on the fuel pressure regulator
(0-100psi 1.5" fuel pressure gauge, part # 15633). Requires thread sealant.
11.
Ensure that any spilled gasoline and any gasoline soaked shop towels are cleaned up and removed from the
vicinity of the vehicle!
12. Reconnect the battery and turn the ignition to the ON position
WITHOUT
starting the car. After several seconds,
check the fuel pressure. If there is no fuel pressure, turn the ignition key to the OFF position, wait one minute, return
the ignition to the ON position, and recheck the fuel pressure. Repeat this ignition OFF and ON procedure until the
fuel pressure gauge registers fuel pressure.
13.
With the fuel pressure gauge registering fuel system pressure, check for fuel leaks from and around the
Aeromotive regulator and all fuel lines and connections near the regulator! If any fuel leaks are found, turn
the ignition key to the OFF position, remove any spilled fuel and repair the leak before proceeding!
14. Once the fuel pressure gauge registers fuel system pressure and there are no fuel leaks, start the engine and adjust
the regulator to the desired fuel pressure. Turning the adjustment screw clockwise will increase fuel pressure. OEM
regulators are typically set at approximately 43 psi, without the vacuum line attached. The fuel pressure adjustment
range for the enclosed regulator is 30-75 psi with the factory installed spring and 75-120 with the optional spring
installed.
