Haltech E6X Manual Win Version - Manual (Page 118)

E6X Manual
118
Ford Thick Film Ignition (TFI)
The Ford TFI module is fitted to distributors used with Ford’s EEC IV engine management
computer system. The E6X ECU can connect directly to this module; however, the TFI
module requires a trigger signal, called the SPOUT (see below), that has a 50/50 duty cycle,
which is not the standard 70/30 duty cycle of the E6X. To use the Ford TFI module you will
have to adjust the Ignition Output Duty Cycle in the Ignition Set-up (see Chapter 4 on
Accessing the Ignition Map) to 50.
Signal Names for TFI Module
PIP
Profile Ignition Pickup Output
(trigger pulses from the Hall Effect Sensor)
SPOUT Spark Out (Igniter output from the ECU) Input
POWER + 12 volts from starter circuit Input
POWER + 12 volts from ignition switch Input
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.