I have a GRT EIS 6000 and HX EFIS; my EIS RH button is INOP and I cannot set the total fuel as I used to. I tried to set the total fuel in the EFIS thru the ENG Page and the LH knob. I can get to the ADJ line; when I try to change the fuel amount from the second line (which is what is indicated in the EIS), it just blinks and will not adjust up or down. Is there a setting to allow the EFIS to control the total fuel? Thanks Barry