Hi all well I've managed to pickup a Allen engine analyzer 16-120 model and what I need to know is what the Co2 and Hydrocarbon emission levels should be for tuning my LPG XF.

I thought that about 1.75 - 2.0 ppm for the hydrocarbons but can't recall!
I also need the figure for Co2?

Does anyone have information on this and does anyone know where I might the manuals for this machine??

Thanks in advance