so with the coolant at ambient( say 20 dgc) , the resistance across pins 11 and 29 of the ecu multiplug (with the ecu disconnceted) should be around 3750 ohms, run the car up to temp(80 dgc) , disconnect teh ecu again and measure across the multiplug pins 11 and 29 again and the resistance should drop to about 380 ohms.


this will prove whether its a wiring/sensor problem, one thing to note, if you have pushed the multimeter probes inteh bottom of teh multiplug and opened up teh spingy connectors too far , they they will not make a good contact on teh ecu pins, this will give a falsely high resistance (ie the ecu thinks its cold) and so will over fuel acordingly...


hth, dave.