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06-27-2022, 05:15 PM
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#1 |
 
Drives: Camaro SS Join Date: Jun 2022
Location: Puerto Rico
Posts: 21
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2018 camaro SS Super Rich on WOT
Last weekend I dynoed my car Stock 2018 Camaro SS and I noticed the car was running very rich in the high 9s AFR. The car I brought second hand, I assume it has the stock tune. I was just wondering why the ECU is targeting the AFR so rich unless the car was knocking bad, or previous owner tuned the car and I am unaware. Because of this car was way low on power.
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06-27-2022, 07:35 PM
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#2 |
          
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,739
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Cat over temp?
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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06-28-2022, 11:42 AM
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#3 |
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Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
Posts: 3,172
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What is it doing in closed loop?
WOT is an open loop mode, and fuel map will usually err on the side of rich. But, agree, 9 is too rich. Fuel trims? |
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06-28-2022, 12:20 PM
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#4 |
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Drives: Camaro SS Join Date: Jun 2022
Location: Puerto Rico
Posts: 21
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I will probably need to buy the MPVI to do some data logging and see what going on.
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06-28-2022, 12:31 PM
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#5 |
Drives: 2017 Camaro SS 50th Anniversary Join Date: Apr 2021
Location: Missouri
Posts: 929
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Yeah, would want to see if commanded afr is actually that low, or that's just a side effect of say... a mechanical issue or misfire. Codes could have been suppressed if it was "tuned".
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2017 50th Anniversary Edition | P1X Stage 2
DSX Aux Low Side | LT4 high side | Flex Fuel TooHighPsi Port Injection (installed & tuning) CircleD 3K Stall | QA1 CF Driveshaft Forgestar F14 Drag 17x10 NT555R2 305/45/17 Rear Forgestar F14 18x8 NT555G2 235/50/18 Front 10.84@131 w/4.13" pulley ??.??@??? w/3.7" pulley (installed & tuning) |
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06-29-2022, 09:58 AM
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#6 |
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Snackbar Tuning
Drives: 2023 SGM ZL1 Join Date: Oct 2016
Location: Florida
Posts: 1,101
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Thats's way rich even for COT. I'd guess that the dyno's Wideband was incorrect. But you should also look at Long Term Fuel Trims and see if the car is adding a ton of fuel that carries over into WOT. LTFT's will carry over in to Open Loop WOT mode if they are positive.
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