Haltech E6X Manual DOS Version - Manual (Page 104)

E6X Manual
104
Note:
Engines with an odd number of cylinders cannot use waste spark ignition since
these engines cannot pair cylinders.
If a 6 or 8 cylinder engine is equipped with a single coil per cylinder these coils can be paired
and driven as a waste spark configuration. Each coil requires an ignitor but the ignitor inputs
can be paired as cylinders are paired in the above description.
B.2.1 Waste Spark configuration
A V8 with a firing order of: 1-2-7-8-4-5-6-3 has the following cylinder pairs: Coil1-1/4, Coil
2-2/5, Coil 3-7/6, Coil 4-8/3. The coil numbers then match up with the ignition output
numbers. The diagram below shows how the coils would be connected.
Figure B1. Coil layout for V8 with firing order 1, 2, 7, 8, 4, 5, 6, 3.
B.2.2 Ignition Order
The ECU’s fires the ignition outputs as follows:
IGN1
IGN2
IGN3
IGN4
The cycle starts after a synchronisation or home signal is detected. Refer to 4.2.3 Ignition Set-
up Page, p46.