In order to do a good job of adjusting your fuel/air ratio, you'll really need to use the newer type O2 sensors, and develop an interface circuit to "fool" the existing ECU by sending signals that are of highly similar voltage levels to the old-style O2 sensor.
Have a look at this page:
http://www.superchevy.com/technical...cessories_electronics/0407sc_bosch/index.html
It does a pretty good job of explaining how the two basic types of O2 sensors work.
What you have at the moment just isn't going to work well at all. Basically, it's going to delay the ECU's response by some pseudo-random factor, so the air/fuel ratio will be cycling radically up and down.
If the O2 sensor were the newer type, you could actually "tweak" the air/fuel ratio. However, if you mis-adjust things, you will either waste a lot of fuel, or risk severe engine damage due to detonation, burned valves, burned/broken pistons and rings, etc.
Have a look at this page:
http://www.superchevy.com/technical...cessories_electronics/0407sc_bosch/index.html
It does a pretty good job of explaining how the two basic types of O2 sensors work.
What you have at the moment just isn't going to work well at all. Basically, it's going to delay the ECU's response by some pseudo-random factor, so the air/fuel ratio will be cycling radically up and down.
If the O2 sensor were the newer type, you could actually "tweak" the air/fuel ratio. However, if you mis-adjust things, you will either waste a lot of fuel, or risk severe engine damage due to detonation, burned valves, burned/broken pistons and rings, etc.
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