Before you yell at me about doing a search please read the question. I have searched(quickly) but didn't see any answers to this particular question

Will a bad or improperly adjusted TPS create a rich running condition that would decreae EGR temps to the point that your cpu could create a code 71?

I have suffered from Code 71, I have cleaned and/or changed every EGR component and done the factory/manual vacuum and mechanical checks. About six months ago I started noticing a variance in idle between traffic lights. My first inclination was TPS. My truck has a less than 2 year old tuneup w/ all new stuff. I will check my timing, but expect I'll have to replace the TPS to get it accurate. Thanks

3.0, auto 210,000mi

 

Definitely, both rich and lean are possible and it's not something to allow to go on for a long time. Pull your dipstick and smell your oil. If it has been running rich enough long enough you'll be gassing out the rings and the excess will be getting into the oil making it thin as well as coating your o2 sensors with soot (which just keeps making the situation worse and will result in codes being thrown).
IMO adjusting the TPS should be a part of every tuneup, but I doubt it ever gets done at any shop unless you specifically ask for that. Adjusting the TPS is easy and replacing would only be necessary if there are dropouts (bad spots). Besides, if you replace it, it has to be adjusted anyway so you might as well test and adjust first before replacing.
Just an opinion.

 

If you still have your original TPS it may not be reading as closed when your throttle body is closed. THe tps has a spring loaded indicator that wont retract to 0 postion unless the spring is good and snappy.

 

Dont want to hi-jack your thread okidoc, but HOW Does one adjust the tps. I am wanting to look into that as im in practically the same rig as you. Tim

 

Tim try this link:

http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

So if we know that the TPS will cause a rich condition, it could be the culprit for a low EGR temp or code 71, correct?