happy wanderer
Day Dreaming ...
Sounds like you are zoning in where you want to be. When you say open loop you mean the CCP is out?
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Sounds like you are zoning in where you want to be. When you say open loop you mean the CCP is out?
Hello Roger,
I have a question. What would be the result if one were to simply remove the stock O2 sensor and plug the bung hole, disconnect the two heater leads, and leave the O2 sensor connected and just suspended in open air? Would the sensor send a continuous lean indication to the Motronic which would result in a continuous rich AFR? I mention disconnecting the heater wires because it would be easier to find a place to tie the sensor without risk of cooking something. Would the Motronic think that the O2 sensor has malfunctioned and just revert to maximum lean because it wants to see a continuously changing AFR?
I'm too cheap to invest in a wide band set up and that is mostly because I can buy pure gas so easily. That said I would like to richen the mix a bit but don't want to spend money doing it.
Without being heated, and in open air, the O2 sensor produces no voltage and looks like an open circuit to the Motronic. The Motronic senses that nothing is connected and uses the fuel table directed by the Coding Plug. So I don't think it would accomplish what you want.
Because Closed Loop operation with the O2 sensor installed allows the Motronic to learn about changes to fueling (injectors & fuel pressure, which can vary several percent), air flow (filter aging) and even battery voltage, I'm not a fan of disconnecting it. Because the Coding Plug tells the Motronic what intake tubes, cams and heads you have, it makes good sense to leave that alone. So the choices for a bit richer for $0 look pretty limited and have been discussed in many other posts.
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Well, almost done. *Roger, do you know of anyway that one can easily detect when the Motronic goes closed loop with a dvm? *A high/low indication would be great. *Also, does the Motronic enter closed loop when fully warmed up and at idle on the center stand? *I have been thinking about constructing a 555 timer circuit and subbing it for the O2 sensor ...
I know that a few of you have wondered what fuel mileage would be at the richer 13.8:1 AFR I'm running.
Just ran my first gas mileage test using the LC-1 Wideband O2. All the driving was on local trips, no highway, up to 25 miles per trip, some as short as 5 miles, plenty of lights.
I burned 2.48 gallons, for 106 miles. That's 42.7 MPG, give or take.
I still plan to take a highway trip and see what the mileage is.