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XfireZ51 · 07-17-2015

Paul,

For purposes of accuracy, the ECM does not actually issue the firing command to the secondaries. The ECM energizes the secondary injector power relays via ground, which in turn powers the secondaries. The secondaries then use the primary injector firing signal. So there is no unique signal coming from the ECM to the secondaries themselves.
Again, another "work-around" from the L-98 avoiding the need for injector drivers on the ECM motherboard.

07-17-2015	#21
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: LT5 miss at all speeds Paul, For purposes of accuracy, the ECM does not actually issue the firing command to the secondaries. The ECM energizes the secondary injector power relays via ground, which in turn powers the secondaries. The secondaries then use the primary injector firing signal. So there is no unique signal coming from the ECM to the secondaries themselves. Again, another "work-around" from the L-98 avoiding the need for injector drivers on the ECM motherboard.