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Thread: C5Z running rich

  1. 11-07-2021 #1
    Z06nV
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    C5Z running rich

    i just got done installing an A&A kit on my C5Z, scaled the injectors accordingly, dialed in the air and spark but the car still runs rich at idle. I have not driven the car yet but at idle it hovers around 10.5 afr (according to my wideband). I tried reducing the air a bit at idle and the highest i got it is 11.5. I checked for any boost/air leaks and dont see any. I have not tuned the VE map, it is still stock. Any idea why i am getting such rich idle? I am attaching the tune and recording at idle.
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    2012 CTS-V BDT, Auto, Every Option | Lingefelter 2.55" UP | DW65 Injectors | C&R HX | Pierburg CWA100 | 90mm TB | Airaid CF Intake with Green Filter | Lingefelter 160deg T-Stat | 534whp/503tq
    2002 C5 Z06 Quick Silver, AR Headers, Borla Axle Back, A&A Kit
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  2. 11-07-2021 #2
    5FDP
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    Pull fuel from the MAF and VE table, it's using both with how you have it setup.

    Can also reduce the min fuel milligrams down a little bit more if you want to try that.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.
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