Fuel trims at wot

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Sep 17, 2013, 11:30 AM

nicolassabra

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Fuel trims at wot

hello

i want to ask why my O2 Feedback Trim and my FuelTrim InUse are 0 at wot ,and the other fuel trims are stuck on the same values

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Sep 17, 2013, 12:32 PM

90zcrex

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It is normal for trims to go to 0 when under WOT. Ecu only uses trims under a certain load, once you hit over that load it uses fuel maps.

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Sep 17, 2013, 02:36 PM

Raptord

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Fuel trims are used for closed loop only, which is used in idle/cruising. Under boost the car is in open loop, and the fuel maps are used.

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Sep 18, 2013, 07:59 PM

domyz

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Quote:

Originally Posted by Raptord

Fuel trims are used for closed loop only, which is used in idle/cruising. Under boost the car is in open loop, and the fuel maps are used.

That's what Jay@Boosted tuning told me also. But I found where I've been misleaded when I thought it the opposite way:
Read from post 95 and below... https://www.evolutionm.net/forums/ec...options-7.html

Did you tested it under 1600hz? I never had/took time to test it.