Hi guys
So I had the car emailed tuned and the tuners have been great to help me get the car right. So the car was running great, at WOT my wideband would show 13.2-13.5 at the max but averaged at 12.8. I drove the car to work and everything was fine. Once I got off work I started driving the car home and the car was running extremely lean. When I first start it the car will idle at about 20-22 AFR but the Short term Fuel Trims will eventually go to 25+ and make the car idle at 15-16 AFR. At WOT the car runs at 14-15 which obviously isn't right. It started doing it out of nowhere. I took off the intake and changed the gaskets, changed the gaskets on the TB, and when through all the lines on the intake. I can't see where there is a leak. I also checked the intake for cracks when I had it off. I also tested the wideband with brake clean and it went from full lean to full rich and its working perfectly fine. I can't find anything wrong. The only thing I can figure is the problem is the injectors suddenly gave out on a couple cylinders (stock LS3 injectors), I got bad gas, or the O2 sensors are going bad but they aren't throwing a light. I don't have misfires or check engine lights. Any help would be greatly appreciated. I tried attaching a log but the attachment window won't upload a log file. I'll keep trying to upload one. Let me say that the tune shouldn't be the issue because it was running fine before and nothing was changed, the tuners have been great. I might try to send them a log but in my opinion its not their responsibility to diagnose my car for me. Here is the tune file. 5.5.22.hpt
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Originally Posted by 5FDP
