well the a/f guage i have takes a minute or two to start fulling showing inaccurate reading through the meter. its not the typical autometer guage, its the led bar that goes up and down. i got it when the i got the toucan carbon fiber indi guages. its tapped off the ecu. i just woundering b/c ihave seen other a/f guages and they seem to work right away and react much faster when you hit the gas. i know the guage is for looks to dont even start the flamin. thanks. . .