ok this is a little unique. I am putting my MegaSquirt standalone fuel ECU in soon. I am tapping into the stock coolant temperature and intake air temperature sensors rather than fabricate new ones. However, the stock ECU bias resistor comes into play. There is a method for figuring out the resistance of everything by means of... some math problem that I haven't looked into yet. My question for the pro's: I don't want to remove my stock sensor because then I will need to refill the cooling system and we all know how annoying it is to get the air out again. What I want to know is, is there any way I can find out what vdo/bosch sensors (part number) are on the car without removing either? Is there a part number look up based on RealOem or BMA parts catalog? Also, does anyone know how many (1 or 2) and what resistance the stock ecu BIAS resistors are? Thanks for looking.