Haltech E6X Manual DOS Version - Manual (Page 110)

E6X Manual
110
COIL - Negative terminal of coil Output
GND Ignition system ground
There are several versions of the Ford TFI module but these notes only refer to the type IV
module. This TFI module is physically attached to the side of the distributor and connects
directly to the HALL Effect pickup within the distributor.
To further complicate matters there are two types of chopper wheels used inside the
distributor, one that generates a normal’ PIP signal and one that generates a ‘signature’ PIP
signal. With the signature PIP, the pulse for cylinder one is shorter than the pulses for the
remaining cylinders. This is similar to Figure E.3 except that the cylinder one pulse is shorter
rather than longer. Unfortunately the edges where the pulses do coincide occur at 10° BTDC.
Therefore the E6X cannot be used with a signature PIP unless the trigger point is moved. If
the trigger is modified be wary of rotor phasing (See Appendix F). The trigger edge for the
Ford TFI module is falling edge. For 8 cylinder engines the Trigger Angle is 55° and for 6
cylinder engines it is 70° BTDC.