Hi,i want to ask if the air and water temp sensors spoil easily? mine is 20 years in my engine but never check if working good!
thanks

 

if it starts and runs fine mate then id be inclinded to leave them alone.

but then saying that, both sensors are relatively cheap so wouldnt break the bank if you added them to your next service

Gives you peace of mind if you are worried and keep the old ones as emergency spares.

 

as above covers it nicely mate

 

Hi,
i fully agree with kelv, but if you want to be sure of your sensors, you can check the output voltage of the sensors from the the pinouts of your ecu with a good DVOM.
The coolant temp sensor of a cosworth is NTC (NAGATIVE TEMPERATURE COEFFICIENT) , this means that if engine is cold, the sensor has a high resistance. vice versa if the engine is hot the sensor has low resistance, therefore if you connect a DVOM on a closed circuit basis you should see changes in the output readings on your DVOM. If it's like i said then the sensor is in good working order. As for the air charge temp you can do the same. When the DVOM is connected to the ecu, raise the accel padal and it should vary the output voltage respectivle, if it does you can put your mind at rest