Ok, after one minor wiring issue, I am now logging boost. After doing this, I can't believe that this isn't more popular. I can only guess that people wouldn't do it because 1. they don't know that it's possible, 2. they think that it doesn't give enough value/benefit for the cost. If someone has a logger cable (starting at $50?), I can't imagine that it doesn't seem worthwhile to spend <$75 for the sensor, wires and vacuum hose/fittings. (much less than $75 if using digikey sensor, but I personally didn't want to go with it because the sensor and wires didn't seem well protected )
The one issue that I noted above is confusing. A few weeks back, I made some notes about how to hook up the wires from what was stated in the first post (without first checking voltages - I know, you said to do it). When I hooked everything up, I didn't get accurate pressure/vacuum readings. So I used a voltmeter, and found that the black wire on the A22 EGRT connector was ground, and the white wire with a black stripe (you said that the manual says that it's light green, but it looks white to me) has voltage, but my notes had it listed the opposite way........ so apparently I goofed when I wrote it down originally. So I switched the two wires, and all was fine. So, like someone else said, hooking up the wires wrong (at least in this way) doesn't seem to damage the sensor.
Anyway, I wanted to say thanks for all the work you've done on boost logging and the MMCd. Unless pocketlogger comes out with a comparable feature for reading the EGRT input and scaling, their software will be permanently put into retirement for me. In case this hasn't been mentioned before, this is MUCH better and safer than trying to watch a boost gauge while going WOT!!!! and it even gives way better info than a peak only boost controller or gauge because it shows the full boost curve and all other typical logging parameters with it (I know this is really obvious and it is the whole point of logging, but I just felt the need to reinforce that it's really great)
Also, I am working on putting together a webpage with info and pictures about my experience (of course with full credit to you, and links to this post). I wanted to put it together to try to document some of the different sensors that were out there, so people could more easily find the parts, and at a better price. I also wanted to have lots of pictures available for those who might otherwise be intimidated from attempting this.
http://rdmelton.autoeducation.com/ca.../boostlog.html
I am still trying to collect 3 bar sensor part numbers, harness part numbers, and key/keyway locations for all of these sensors and harnesses. (I know that if the keyways don't line up it is a very minor issue,and that they can be fixed in a matter of a few seconds or a couple of minutes at the most, but it is a bit annoying, and would be nice if they matched up correctly. So, if anyone has information about the GM style 3 bar MAP sensors and/or harnesses(part numbers and/or key/keyway locations), please let me know and I will update the page.