Some conflicting data on EGR abortion.

[NerdNoise]

So I aborted my EGR the other day by blocking off the exhaust gasses as they enter the intake manifold. Up until now I gathered that blocking off the EGR will only do good things but I found the Wikipedia article on EGR and I came across two statements of concern:

• EGR is typically not employed at high loads because it would reduce peak power output. This is because it reduces the intake charge density. EGR is also omitted at idle (low-speed, zero load) because it would cause unstable combustion, resulting in rough idle. The EGR valve also cools the exhaust valves and makes them last far longer (a very important benefit under light cruise conditions).[citation needed]
• Reduced heat rejection. Lowered peak combustion temperatures not only reduces NOx formation, it also reduces the loss of thermal energy to combustion chamber surfaces, leaving more available for conversion to mechanical work during the expansion stroke.

So the first thing is that I know that the 3VZE has a history of exhaust valve issues especially to the rear cylinders and I'm curious if I'm going to cause more problems than I'm going to solve. Of course this statement has the Wikipedia TM of [citation needed] so I couldn't follow that statement any further.

Is there any validity to the second statement wherein you actually lose power? You'd think that once the motor is warmed up this becomes null and void. Thanks.

 

[flash02]

I am very curious as to the validity of Wikipedia's facts, if the valve does not work at high speed or low speed-no load then when does it work? The EGR valve, when open, greatly increases intake temps which will cause loss of power and potential knocking, the combination of recirculating exhaust gasses into an intake that has the crankcase vented is what cause the baked on char broiled mess that most of us are very familiar with when cleaning the upper intake plenum of a 22RE. I've removed the EGR system and will soon plum/vent my crankcase vapor into a catch can and NOT my intake. It's funny all the crap that has been added to an engine to keep it clean can cause more issues then it solves, venting crankcase vapor into the intake can lower the octane of the fuel air mixture, higher intake temps caused by the EGR valve will also decrease how an engine can preform, worn and defective components add greatly to what in my opinion is a very flawed system.