Yes.Correct, I have the LC-1 simulated signal going to the ECU and that`s the only oxygen sensor I have ( and it`s at its stock position around 8 inches into the exhaust manifold).When I start tuning i switch to the wideband signal with a switch.
My AFRs are rich when I start the car (for 10 or so seconds when the LC-1 is waming up), then when the led is solid red (meaning the lc-1 is fully hot) the AFRs jump to 17 and stays there for 2-3 minutes and all of a sudden it jumps back to 14.7 and everything is fine from there on......weird!
gtpilot wrote:
Are you feeding the ECU with the simulated narrow band signal from the LC-1 instead of a stock sensor?
If that is the case I can see what you are talking about happening, as the code in the ECU is making corrections for coolant temp and air inlet temp as the car is warming up...once those temps get to a certain level it starts depending more heavily on the o2 sensor reading to make corrections. What more concerns me is that you are running that lean at start up...every data logging session that I have done at start-up to try and understand the way the ECU functions shows a rich condition, not lean. Where is the LC-1 sensor placed in the exhaust exhaust system?
I run the narrow band up in the stock location (~ 8" from the head) and my WB down in the header collector...it takes about a minute for the stock sensor to start reading a true signal.
Kirk