amdaman

Hi,

I've always had an annoying problem with my aircon and my AEM setup. When it's on at idle it makes my AFR read lean 17+.. It's fine when I'm cruising but not at idle. My revs are also fine as I've got a ~5-7% load increase during aircon.

I've also noticed that when my radiator fan kicks in at idle my AFR leans out again then stabilises.. is this connected?

Cheers!

King Tut

They are connected. What you are experiencing is a voltage drop from the A/C fan and the radiator fan pulling additional amps. Your fuel injectors are set to inject for a certain period of time for different voltages. Your tuner needs to richen up the settings for your lower voltage when the fans are on.

amdaman

Hi - is this set in the injector batt offset table? I had a play with it but obviously it will run richer on idle when the aircon isn't on?

Is there another table I can look at? Cheers!!

shind3

You are probably in the next higher load cell when the AC is on at idle. Your tuner must not have spent much time tuning the low load/RPM cells with the AC on.

amdaman

The voltage on idle is right between 12 and 13 so adjusting this is so difficult!

I have to increase the 13 value loads and reduce the 12 value loads to get a medium and even then it's still not quite right.