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Thread: startup idle rich, hot idle lean

  1. #1
    Tuner in Training BigMatt's Avatar
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    Jun 2016
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    Delaware
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    startup idle rich, hot idle lean

    Hey guys I'm having an idle issue trying to get my vve tables tuned. Every time I data log on startup my idle is .75 lambda, drive around datalogging get back to my house idling and it is at 1.15-1.25 lambda. I keep copying the tables and multiplying by half in the vve and interpolating but I can't seem to get it down.
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    2010 Camaro ls3, zr1 3 bar map, dsx flex fuel, lpe twin fuel pumps, arh 1 7/8, rps twin carbon, Corsa Xtreme, MGW shifter, CAI inc, ATI 10% overdriven balancer, ID850s, Whipple Supercharger 2.9L 3.75 pulley, carlyle racing 15 inch conversion

  2. #2
    Senior Tuner Lakegoat's Avatar
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    Jul 2012
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    Florida
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    Turn off desoot while you are tuning. If you are running 58psi, I don't think your IFR table is correct for ID 850's. Smooth your ve table and manually push the sharp peaks and valleys back to normal areas and retune. Steady pedal makes for less sharp corrections when you are logging. Do you have a boost referenced, return style fuel system?
    2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
    2013 Silverado 5.3, 6L80k 8.8