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Hog · 08-15-2014

Does the LT5 use a "wasted spark" ignition, or an ignition that fires the plug both during the compression stroke AND the exhaust stroke, or whenenever the piston is near TDC?

The reason I ask is because GM's other DOHC V8 the Northstar 4.6 liter V8 did use a "wasted spark" and my 300hp L37 Northstar would also require some extra cranking time before it started, even after letting the intake pump perform its pre programmed cycle when te ekey is in the run position, before turning further to crank the engine.

08-15-2014	#25
Hog Join Date: Jul 2010 Location: Woodstock, Ontario, Canada Posts: 1,271	Re: Why don't they start right up? Does the LT5 use a "wasted spark" ignition, or an ignition that fires the plug both during the compression stroke AND the exhaust stroke, or whenenever the piston is near TDC? The reason I ask is because GM's other DOHC V8 the Northstar 4.6 liter V8 did use a "wasted spark" and my 300hp L37 Northstar would also require some extra cranking time before it started, even after letting the intake pump perform its pre programmed cycle when te ekey is in the run position, before turning further to crank the engine.