Thank you for the response. I will be buying a bluetooth adapter. I like the option of using my Surface for tuning so PCM Hammer looks like a better choice, but I don't know if I want to wait 30-40 minutes to download the tune. I have a 2003 C5 Z06. I have a 2003 C5 Z06 as well and I have successfu...

In my case, I was stil running constant rail pressure, so my IFR table was sloped, varying based on manifold vacuum. In my case, atm pressure was around 87 kpa. Once baro updated to 104kpa it would throw off all fueling calcs. Most noticeable at idle where fuel trims would swing something like 15 to...

Wow, that's great. I was having this exact issue on 411 512K LS1.