I need some help setting up the afr percent error histogram. I'm using the ac pressure switch and I have the afr reading right and everything. But when I use this equation 100*((([PID.7101]/.625)+10) -[SENS.121])/[SENS.121] to set up a user defined parameter. I get like between 119%-126%. What sensor do i need to use? I'm commanding a 11.9 and getting low 10s. Could those numbers be correct?