09-01-2008, 06:44 PM
Join Date: Jan 2006
Total Cats: 0
Megatune isn't reading my wideband AFR correctly after hi res
Before I went to hi-res (was running 29_ before) megatune showed the same AFR as my AEM gauge (it's an AEM linear). After upgrading to hi-res it's now reading ~ .3 AFR lower than the gauge. Anyone know why this might be?
Also, I looked into the equation in Megatune configurator and it looks funny:
AFR = 9.72 + egoADC * 0.038666
which is strange, according to AEM the end points are:
AFR 10.0 at 0V, AFR 19.98 at 5V
I thought the equation should be:
AFR = 10.0 + egoADC(V)*(1.996)
Is the equation in Megasquirt Configurator wrong???
Last edited by fluke; 09-01-2008 at 06:57 PM.
Reason: I screwed up my math