[Diy_efi] O2 says rich, car runs lean..

[Gary Spooner]

Hello.


The ideal temp for a non heated 02 sensor is approx 600 C before the voltage 
can be considered accurate. Go to a fire extinguisher recharge station or 
store and purchase a heat pen having a melt point near that temperture. Draw 
a line in the area of the pipe you would like to place the sensor and draw 
the line back away from the engine. Start the engine, take the car for a 
drive, give it a few good runs, rev it up a few times to get the header 
really hot and look to see where the line starts. If the pipe is any hotter 
the line will have disappeared. Look to see where on the pipe the line now 
starts and place the bung in that location. This will prevent the sensor 
from getting damaged by excess heat and a good location for the sensor to do 
it job.

gary

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