TimingLock^TM Installation Instructions (Ford TFI-IV)

Follow the diagram below to install the TimingLock:

* We highly recommend installing the TimingLock inside the vehicle.
** The blue wire (2-step activation) is optional. It can be left unconnected.

Quick Start
- Key on, verify that the green power LED illuminates
- Start the car
- Press the toggle button once; lock LED will begin slowly flashing
- Adjust locked timing using the + and - buttons and verify with a timing light
- Press the toggle button again to return to normal mode
- Apply 12 volts to the brown lock wire; the lock LED should illuminate solid and your timing should lock to specified advance

The following table lists the modes of operation:

Mode	Lock LED	Timing	Operation
Normal	Off	Stock timing
Locked	On	Locked timing	Note 1
Set locked timing	Slow blink ~ 1.5/sec	Locked timing	Note 2
Set Rev-Limit Low	Medium blink ~ 3/sec	Locked timing	Note 3
Set Rev-Limit High	Fast blink ~ 6/sec	Locked timing	Note 4

Note 1: ‘Locked’ mode will be activated anytime the brown lock wire is connected to 12 volts.

Note 2: Press the ‘Toggle’ button to switch between ‘Normal’ and ‘Set locked timing’ modes. Use the + and – buttons to adjust the locked timing. Verify with a timing light.

Note 3: Rev the engine to the desired RPM. Press and hold the ‘Toggle’ button and then press the ‘-‘ button once to set the lower rev-limiter. Press the + and – buttons to adjust as needed. The lower rev-limit is activated by connecting the blue 2-step wire to ground.

Note 4: Rev the engine to half the desired RPM. Press and hold the ‘Toggle’ button and then press the ‘+‘ button once to set the upper rev-limiter. Press the + and – buttons to adjust as needed. NOTE: This mode uses a divide by two circuit to make setting the rev-limit easier. Setting your rev-limit to 2600 will yield an actual rev-limit of 5200 rpm. The upper rev-limiter is always active.

Reset settings: To reset all settings to defaults press and hold all three buttons simultaneously, then key on.

Disclaimer

XPI does not assume any liability arising out of the application or use of any product described herein. The user of products in such applications shall assume all risks of such use and will agree to hold XPI harmless against all damages.

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