I posted on FSC, and decided to add it here, too. Thot I may speed up the "learning process".
"Am still working on the 7.4 Vortec, in the 2000 3/4, and have a question regarding sensors.
The truck has no cat[s], and a custom exhaust system on it.
There are 2 O2 sensors still in the head pipes, but no sign of the rears.
From what I've been able to read on other posts, there were originally 4 sensors.
The ? is: were all 2000 7.4 trucks equipped w/ 4 sensors?
I have looked at the tune file w/ EFILIVE, and see that the rear sensors, along w/ other smog related items, are shown as "not reported".
I read this post, and found I have a software version that does not have the pid[s] I need.
http://forum.efilive.com/showthread.php?t=4417

[I get no fault codes, nor have I found empty wiring plugs/sims.]
Maybe, I'm looking for something that doesn't exsist?
Can someone e me a stock tune file that I can use w/EFILIVE??
BTW, DFE1 and I are going to update my software tomorrow!!
NE help is appreciated!