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Title: 1.8T AUM with S3 BAM Injectors running too rich (LTFT -9%) Post by: mk4clique on April 16, 2026, 11:23:58 AM I have a Golf 4 1.8T AUM with a Stage 1 tune. I have installed injectors from an Audi S3 8L BAM (0 280 156 063) and integrating them into tune.
I've already transferred all the necessary maps from the BAM file: KRKTE (0,08356) TVUB FKKVS (with axes) FKVA KVB I noticed that my LTFT value is at -9%. STFT is good (-0,5%). Is my KRKTE value too high? I have already tested the system for vacuum/boost leaks. FPR and MAF are already new. I hope someone can help me with my problem. Title: Re: 1.8T AUM with S3 BAM Injectors running too rich (LTFT -9%) Post by: grayjay on April 16, 2026, 05:10:35 PM Injectors deliver different volume of fuel and thus need different KRKTE if the fuel systems base fuel pressure is different. If fuel trim is negative it is removing fuel, divide your current KRKTE / 1.09 to adjust KRKTE to match your actual higher fuel delivery flow.
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