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Old 06-22-2018, 12:07 PM   #36
aljeezzy
 
Drives: v6 6speed 2012
Join Date: Jun 2015
Location: east 10
Posts: 15
During idle, at the last phase of the exhaust stroke, a little bit of exhaust gas is sucked back into the engine through the exhaust valve for the purposes of EGR. The EG lacks O2 and needs less fuel to combust the same volume of fresh air. This idle mix burns cooler because there is less energy being released. Is the EGR phase coking the intake valves because they stay cooler than the exhaust valves? Are my exhaust valves coked too? Who has aftermarket cams with coking pics?
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