Setup:
20k miles 07 A/T supercharged with 9.5lb pulley, short ram intake, NGK Iridium BKR8EIX gapped to .032, stock exhaust with O2 sensor in s-pipe, and Unichip with 9.5lb map.

Problem:
I have the Innovate lc-1 with the auto timer for AFR display, but I have logs of full throttle runs using the serial connection to my laptop. I am getting a high 9/low 10 at full throttle. I do get a steady 14.7 at idle so the sensor is accurate, until I go for a long freeway drive and get back on the street idle AFRs dip to around 14.0.

Solutions I've tried:
I have tried disconnecting the Unichip, using stock intake, changing to supplied spark plugs, and cleaning filter and maf sensor, and combinations of all of these.

Sorry for the info overload, just trying to get answers to questions before they are asked. I am thinking it's the plugs or the O2 sensor that is causing this, but I am basing that off the info I have learned here and would like someone else's opinion. I also have a scangauge and don't have any codes or any CEL.

 

I'm going through a similar issue, but i have no scan gauge. I'm guessing boost leak or fuel trims. What are your ltfts and intake air temp when this happens?

 

I'm showing full boost at wot, iat average 90, and I'm not sure on the ltft, I tried a few codes but got no reading from the sg. If anyone is getting ltft off the sg let me know which code you're using.

 

anyone?

 

I am planning to get a custom tune, but would like this issue fixed before I do. Anyone have any ideas what this could be?

Maybe if I posted a pic of a 'cool' license plate this thread would get some attention.