sorry, didn't get the title.

sensor at front of head on exhaust side is just water temp for gauge in dash - the ecu has a separate one.

i would recomend that you join up as a gold member. you will then have access to an online manual for the YB engine that has all the information you need regarding how te whole management system works, what sensors do what, where they are, what they should read, etc.

it will cost you less than the price of one sensor that you may otherwise neddlessly replace.