Haltech E6GMX - Manual (Page 99)

E6GMX Manual
99
G.M. Direct Fire Ignition
The G.M. Direct Fire Ignition module (DFI), as used in the V6 Buick, can be connected
directly to the E6GMX ECU. This module serves both as a trigger device and as an igniter.
The DFI module has an ignition bypass input from the ECU. This input tells the DFI module
to ignore the ECU’s timing signal and fire its own spark at 10° BTDC. This gives a more
reliably timed spark for cranking. This input is controlled by the E6GMX through the Aux.
Out Function. The Aux Out Function should output a ground signal when the RPM is below
500rpm, then switch to ~5v when engine rpm exceeds 500rpm. To use the bypass, this
function should be set in the Identification to Bypass. See Chapter 3 [3.1]. The bypass will
allow the DFI module to control spark below 450 rpm.+
Input/Output Setup page showing the GM Bypass Setup
Ign
Bypass
Setting