First time tuning. I have a lean idle, but every time I try to richen it up I can see my LTFT?s start pulling more fuel out and my AFR goes back to lean again. I keep trying to richen it up and the computer keeps pulling fuel out. What am I doing wrong? I?m using an AEM 30-4110 AFR gauge for data logging. Ltft are now -20 with afr 16-17. When I started AFR was about the same with ltft negative single digits.
Last edited by Dwg86; 05-08-2022 at 07:20 AM.
May just be bad O2 sensors. Not sure if the belly pan in the intake manifold would cause it to pull fuel to lean out - usually that's just a vacuum leak that causes a lean condition on these. Could also just be a bad wideband sensor - do an open air calibration test and see if it passes - if not bad wideband sensor.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
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can you give more details, or post a log. is your engine stock
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