Loki Posted June 24, 2019 Share Posted June 24, 2019 Hi, I got near perfect fuel trimp whenever air temp is greater than 11C. However, the last few days when I got the car running when air temp is lower than 10C say 5-8C then fuel trim would be roughly around +3-5%. Where do we adjust fuel vs air temp compensation please? Regards Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted June 24, 2019 Share Posted June 24, 2019 51 minutes ago, Loki said: Hi, I got near perfect fuel trimp whenever air temp is greater than 11C. However, the last few days when I got the car running when air temp is lower than 10C say 5-8C then fuel trim would be roughly around +3-5%. Where do we adjust fuel vs air temp compensation please? Regards When you say 5-8c are you talking about when the engine is cold or up to temperature? If the engine is still cold use the lost fuel tables, these are used when the valves and head are still cold/cool and not atomising the fuel as well. If the issue is when the car is warmed up and you experience a constant fuel trim error at all loads then you could adjust the aircharge VE temperature scalar. Beware this is a global scalar and will affect all loads including WOT. Quote Link to comment Share on other sites More sharing options...
Loki Posted June 24, 2019 Author Share Posted June 24, 2019 Thanks Roland. 5-8C as in driving in that ambient air temp: winter weather. Some day it will dip into 2C early in the morning Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted June 24, 2019 Share Posted June 24, 2019 Just now, Loki said: Thanks Roland. 5-8C as in driving in that ambient air temp: winter weather. Some day it will dip into 2C early in the morning make a small adjustment to the cells in the aircharge VE multipler and see how you go with that. You could rescale it to fit your data as well. Quote Link to comment Share on other sites More sharing options...
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