Originally Posted by HDDP
Scott: It sounds like you're pretty HIP to the CHIP... Too bad you're not in CA, I would drop the car off to you. It would be useless to just send the ECU. Perhaps you can recommend someone in the LA area that has your level of expertise and a dyno at the shop. PowerChip is IMO useless, they just preloaded and ran...
We have a rep in San Jose... John at Rocketeer Performance, he might be able to help you out or point you to a local shop.
http://www.rocketeerperformance.com
UPsolute does offer some custom tuning if you have a dyno plot with AFR, taken with your latest mods.
But you may not need this...One thing you might try (in addition to logging some basic data) is to fake out the rear sensor a bit, have look at this link:
http://www.ephatch.com/resource/simthing/simthing.htm
Seems to work ok, I've seen this method on several car boards. Of course assuming you actually have an issue from the test pipe.