vacuum and idle question

Not fretting yet, and I couldn't agree more that it's a tough order to work sight unseen. I spoke to Brian about coming up to his shop after we get it driveable, and he said that 95% of what he does is over the phone and remote. Seems it would be the "easiest" thing for everyone involved to go there..

In my opinion, I need to get it driveable, and do a little break-in before I do dyno pulls, but I intend to, if that is what is needed. I've gone this far and whatever it takes to get the tuning right I want to do. Just haven't got there yet.
 
update

Put a new IAC in today. Idle is beginning to act civil! Unfortunately, I wasn't able to get away from work early enough to drive it. My mechanic did let it idle and learn some more, and drove it, and it is not killing at a stop, and is not stumbling as much. Very good news indeed. It does suffer a little rpm drop (maybe to 500rpm but recovers) when you stop, but doesn't kill.

I have tried to reach Brian at Apten, but he's been hooked up and not able to talk. I am lining up a dyno, and planning the next step.

Now if anyone reads this, please don't think I'm a total moron, but... I was kicking around the need to consider changing the O2 sensors (while we were at it ...for good measure). I changed them when I did the exhaust in 2000. At that time I put new ones, but due to the headers, I didn't know about the longer wire length sensors that Bosch sells and needed to reach the ports and the new wires didn't get it. So, I cut the old wires off and spliced the old plug into the new O2 wire to get extra length. I was very careful to use an electronic crimp/solder splice and heat shrink tubing on each wire and overlay the spliced wires with heat shrink, then put the heat protective sleeve in the area of the most heat. Best I could do, I thought. It has been working fine for almost 4 years now. I only have put about 15K miles on them (my SC is not a daily driver, but a hobby/project car/take it to work once a week car).

My mechanic is a racer himself, and savvy to most things related to sensors and PCM interface (but a Corvette specialist @#$%$^). When I told him about this, he said that all he has heard would tell him that I did a big no-no! He wasn't totally sold, as my rig has worked, and you would have to believe that the connectors I used should not contribute any more resistance. Just to be on the safe side... they will be changed with longer wired units.
Things are looking up!

Now....what say anyone about the splice?? It really won't matter soon, but I wonder.
 
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