Well here is the latest;

Since I had the s/c installed our car has thrown a error code which is to rich on both left and right bank. This happens sporadically. So when I try to get the computer to go to a ready state on all eight areas, the rich error clears the ready states, making me start all over again. I had it in the shop, and they could not get the cold start to go to a ready state. It kept aborting the shops diagnostic equipment. Sooooo..... now I will try one more time to get the ready states set, and then if not, I will be traveling down to see Andy at A&A and have them find and fix the problem. That is a 1200 mile round trip, so I hope I can get it fixed here first. At some point, I will need to see Andy and get the over rich problem fixed. I have talked to Andy and Josh at A&A, and as usual they are very friendly and ready to help once I get it down to them.

 

Most likely not a result of the SC installation as there is no boost at idle or low RPM driving
Did you add LT headers by chance as well ??? Or change your exhaust stream somehow ??
These are the usual suspects for "rich codes" As the Lt's move the front 02 bungs further rearward than the stock manifolds--sometimes as much as 3'----So your 02's don't work right--They tend to not heat up as well and don't read correctly
LT's inherently always cause your P/T fueling to go rich--just the nature of the beast
You can check to see how well the 02's are working with most any scanner--The 02 voltages must oscillate rapidly and have an average voltage around .400 to .480 millivolts--A higher average is richer---
PS: This is assuming your tuner is still using the stock Closed/Open loop tune
With SC's often tuners will switch your system to a "Speed Density" or a "Semi Open Loop Tune"----depends on how much HP and boost you're making--With these types of tunes the richness can also be corrected using the VE table or the open loop table--I'm sure he could fix it either way---
If you have a closed/open loop stock tune with LT's report back and we can show you how to correct the richness on your own--

 

No headers. Just stock exhausts.
Andy tuned the engine for the s/c he installed. As you have said, it might be something else. Our local shop has no way of adjusting the tune. They are a basic smog check place that does other repairs on all types of cars and trucks. They do not specialize in Corvettes. They do have a obdii scanner and can check for not ready codes. They were able to get the computer to show a ready state on all but two of them. The one they are having the most problem with is when you do a cold start. Their program aborts about half way through the test. The other problem is the cat system check. In California you can only have one not ready state before doing a smog test or it will fail. Since they could not get the cold start to reset, they took it for a drive to get the cat reset, when a couple of miles from the shop the check engine light came on with the codes of two rich on bank one and two. That resets all the ready states back to not ready, and you have to start all over again. The cold start test is tricky when the ambient air is cold, so I might need to turn on the heater in the garage to warm up the area before trying to do the cold start test again. I know Andy can fix the problem, I just hate to go the 1200 mile round trip down to southern California.
Thanks for your input.
All help is appreciated.

 

Sounding more like bad 02 sensors---
You can check to see if the 02's are working with most any scanner that shows real time data----A failing 02 won't oscillate and will be flatlined at .450 millivolts--Strange that both would fail at the same time unless something fouled them both at once--
Again this is assuming you're using the stock closed/open loop tune
Your tuner can set all the readiness tests to show "ready" immediately and permanently all at once---Only drawback is you won't get codes anymore for "real" problems and will have to rely on your own judgement to figure out what's wrong if you're having issues

 

Hmmmm,,,,, I will check into that.. I doubt that both o2 sensors would go out at the same time, but anything is possible. I would have to ask Andy if he put in a stock closed/open loop tune... I don't know.