3
4. Cut the (4) injector wires about 12” from the factory injector connectors. Strip 1/4” of the insulation from the wires left on the
vehicle. Connect these to the wires on the harness adapter assembly by using the butt connectors provided. If all wire
colors match one for one, connect them. If they do not, see
Figure 3
. The white wire needs to go to ONE of the pink or red
wires. MATCH the remaining wire colors with those on the vehicle.
5. Reconnect the throttle linkage. For vehicles equipped with cruise control, reconnect the linkage, and secure it with a clip.
Reconnect the transmission kickdown cable (if equipped).
Figure 3
IMPORTANT:
The TV cable must be readjusted in order for the automatic transmission to shift properly. Depress the metal
lock tab on the adjuster and hold on. Pull the cable through the adjuster away from the TBI. Release the metal
lock tab. Depress the accelerator pedal to wide-open throttle. The cable will self-adjust.
6. Reinstall the fuel pump fuse.
7. Cycle the ignition key from the “OFF” position to the “RUN” position several times, keeping the key in the “RUN” position for
three seconds each time. Check the fuel connections for leaks.
8. Reinstall the air cleaner spacer and the air cleaner. Use the new gasket provided.
9.
Use a fuel pressure gauge to verify that the fuel pressure is 12 psi for 502-3, 502-4, 502-5, 502-7, & 502-8. The fuel
pressure for the 502-6 should be 11 psi.
Start the engine and let it reach operating temperature.
10. Unplug the idle air control unit (IAC).
11. We suggest adjusting the idle to 700 RPM or desired RPM (the throttle adjustment screw is located on the opposite side of
the TPS).
12. Reconnect idle air control unit (IAC).
13. Turn the key to “ENGINE OFF” and adjust the TPS to .65 volts.
14. Start the engine and let it run for several seconds. Shut off the engine and recheck for fuel leaks.
NOTE:
The on-board computer has adaptive memory; therefore, performance characteristics may change after a few days of
driving.
NOTE:
The on-board computer may have stored codes caused by the previous TBI malfunction. If it is necessary to clear
these codes, disconnect the negative cable at the battery for 30 seconds. If the “CHECK ENGINE” light comes on,
consult the vehicle’s service manual and follow the diagnostic recommendations.