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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).
Since the EGR system recirculates a portion of exhaust gases, over time the valve can become clogged with carbon deposits that prevent it from operating properly. Clogged EGR valves can sometimes be cleaned, but replacement is necessary if the valve is faulty.
if thats all it does i wouldnt get rid of it .
does it stall out at idle or while driving?
while cold or hot?
there are many possibilities.
but a common problem on these 3.1s is the IAT motor or idle control motor attaching to the throttle body.
post me back