Wideband and clicking pump

[trmurphy21]

hi all, 2 things, hope someone can help

i need a new wideband and i was looking for 1 that could detect if 50/50 in the mixture, these exist? as in gauge reading normal air / fuel and then separate indication for methanol, this possible?

also my pump make a clicking noise sometimes, i only notice at idle at traffic lights etc but not sure if its the same under load, anyone familiar with this?

thanks