Quote:
Originally Posted by universeman
Re the Actron: I guess we are waiting for the old fat man to come back and tell us the rest of the procedure we need to follow!  |
The low numbers don't indicate the Mighty Actron is wacked out. It means the O2 sensor is picking up a way too rich mixture and is fighting as best it can to combat that.
Thing is it works a little backwards from intuitive thought. I will state this from memory but I think I remember it right.
Let's say your O2 sensor says 0.8V based on the amount of oxy in the exhaust. That means rich. That voltage goes to the box. Box says "lean it out" through a reduced duty cycle. Dwell meter drops down. The meter is not reading rich, it is telling you it is fighting against rich.
Everybody wants to hit the 3mm screw right away. However, I do not think a wee test to get a feel for how to tweak it using the dwell meter is a crime. Importantly, don't dial it in to "22.5" and walk away. Air leaks, fuel pressures, etc need to be addressed to make sure you are not simply masking another problem.