Purpose of EGR on 2001 4.3??

[flatblack]

First of all i do have the air injection on the headers, dont know if that is a part of it, but i was wondering how i tell if i have this egr system that i hear everyone remove??? and i saw in the forum store they have a egr block off plate for like 6 bucks! would that hurt anything to block it off or what???? suggestions? sarcastic imput?

[rat]

It lowers combustion temperatures under certain part throttle conditions, helping to lower NOX emisions. It also alows the computer to advance the timing a little bit. If you remove it you will need to have it tuned out. I have eliminated my egr.

The egr port is on the back of the drivers side header right near the collector. It is a threaded nipple. On the front of your intake maifold right behind the a/c compressor is the where the pipe ends. There is a large black cylindrical egr valve with a 5ish wire connector right on the front of the manifold next to the thermostat housing(it is on the drivers side). The air fittings i think are on both headers if you have them, and they are a flat flanges with threaded holes. They are toward the front.

Not sure what your air injection question is, that shouldn't change any thing if you remove it. I have headers for an air injected truck, but will just be blocking the ports off because i don't have air injection.