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secondchance · 04-24-2009

I believe EGR system was added after 93 model year LT5.
I always thought EGR came into play after cold start and its purpose was to aid in faster warm up in order to control emissions.

A few minutes I was talking to a local mechanic regarding light detonation at light throttle and he was saying that it may be due to clogged EGR valve.

Does EGR come into play after motor has been fully warmed up?

Your thoughts?

04-24-2009	#1
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,723	EGR system I believe EGR system was added after 93 model year LT5. I always thought EGR came into play after cold start and its purpose was to aid in faster warm up in order to control emissions. A few minutes I was talking to a local mechanic regarding light detonation at light throttle and he was saying that it may be due to clogged EGR valve. Does EGR come into play after motor has been fully warmed up? Your thoughts?