some times one of them lighting light red and then after a while it turns orange. and further more sometimes they both but at different
i guess its the Air/Fuel ratio guage u are talkin abt..
well when it light Red...it means that it is running Lean(less fuel than air...not good)
when it is lighting Green..it means it is running Rich(more Fuel than air...also not good. u are burinig excess Fuel)
when it is lighting Orange..it means the Air & Fuel is Balanced -Stoicometry(correct and and fuel mixture)..
But the thing with these lighted Airfuel guages....it take atleast 2-3sec to give a reading