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06-24-2020, 08:13 PM | #1 |
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Running VERY Rich after new injectors and ESS Tune??
After several years on my wish list, I finally bought a brand new ESS VT2-525 supercharger and got it installed. I was previously running an Evolve tune with no major issues. Occasionally, my car would "hunt" on idle and once or twice even stalled (this was very random and very seldom). Fast forward, I get the ESS tune uploaded and fire up the car and I and I am running about 12:1 AFR WITH maxed out STFT at -30.5. ESS said the tune is correct and thought it could be my aftermarket Status Gruppe headers so they recommended I put back on my OEM headers. I did, and still maxed STFT and running rich! I am awaiting getting my aftermarket wideband sensor/gauge installed, however, all signs point to be ACTUALLY running rich, and not just showing it (all 4 O2 sensors indicate rich, my plugs are fouling, STFT is maxed at -30.5, and AFR shows around 12). The guys at ESS have been helpful but I feel like they are just kind of guessing around at this point.
I have checked and cleaned the plugs and coils and there are no codes. Has anyone experienced anything similar, with or without a supercharge? I have considered bad O2 sensors, but the likelihood that all 4 of them failed seems very low. I also wondered about a bad fuel pressure regulator, but I feel like a failed regulator would result in low pressure and running lean. |
06-24-2020, 11:48 PM | #2 |
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What size and brand are your injectors?
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06-25-2020, 12:27 AM | #3 |
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06-25-2020, 08:45 AM | #4 |
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Are you located in SoCal?
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2008 E85 ///MZ4 Roadster - Sapphire Metallic Black / Imola Red Int.
IG: Jessed.alvarado Mods: ProFlex E85 Flexfuel kit, Eventuri Carbon Intake w/ RPI scoop, Megan Headers, Custom Axle-back exhaust, KW V3 Coilovers, Stoptech ST40 BBK, Poly FCABs, APEX PS-7s, Diode Dynamics Headlights, CF Trunk Spoiler, Sideskirts & Diffuser. |
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06-26-2020, 11:03 AM | #5 |
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06-26-2020, 04:52 PM | #6 |
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Drives: ESS/G-Power Z4M, VF Z4, 996tt
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Do you have any MAF error codes? This is one way to be certain the alpha-n tune is loaded in place of the stock tune without pulling the file. How are you data logging?
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06-26-2020, 05:59 PM | #7 | |
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I use the Torque Pro app and a bluetooth OBDII. |
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06-28-2022, 01:38 PM | #8 | |
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