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How to fix negative Fuel trims in SD?

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Old Feb 13, 2012 | 08:01 PM
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wingless's Avatar
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How to fix negative Fuel trims in SD?

Hello kindly internet tuning community. I have been running speed density for a few years now and I can get it running really nicely but it really seems happiest when the trims are near pegged rich.

I have found a more or less happy spot with MAPKpa/Load table, I have my fuel map @ 14.7 in all cruise and idle areas, stock injectors and values.

I have been ratcheting down RPM/VE and MAF comp to lean it out and I can't seem to get it significantly lean enough to lower the trims without sacrificing drivabillity. Lowering the load side vs MAPKpa to less than 1:1 produces lean tip in over 60 load and still doesn't seem to move the trims much.

Am I going about this all wrong? I should not have to mess with the latencies or scaling with the stock injectors, but I can't seem to get it to drive nicely without either LTF low/mid going -12.5 and tossing a code.

Any suggestions? Thanks.
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