I've had a S200 in the dd for a few years now and decided to give a S300 a try.The first thing is the car is a '93 vx with an "upshift" light that is always on now.This wasn't on with the S200.I looked in settings and parameters and didn't find anything that would help.I can pull the bulb if there isn't any other option.
I don't see the voltage tables after the latest update for my wideband.I'm using a NGK wideband and it is 9:1 w/0 volts and 16:1 at 5 volts.

 

Did you use the same ECU when converting up from S200 to S300?

 

Different ecu's,both are p06's.I do have access to another ecu chipped for S300 if you think it's the ecu.

 

I see they have moved the wideband setting to "Parameters-closed loop".I'll try another S300 ecu and see if the upshift light goes out.

 

Post up your file.

 

Now I'm going through start/won't start hell.I must have disturbed something in the harness.It will start up and run.Shut it off and it won't start back up.Cranks but won't fire.Wait a minute and it will start back up.Does it with either the S200 or S300 ecu's.

While it was running I did work with the setting table.I used .49v offset and 0v = 9 and 5v = 16:1.The a/f reading sits at 1.2 at idle.If I change the offset it it will change the number up and down slightly.
I couldn't get it to start with an other S300 ecu with my hondata unit installed.But then again it won't start with the S200 that's been in it for 4 years every time.

Right now I will be happy just to get it running like it was again.

 

Update!

No start at all regardless what ecu is plugged in.Popped the hood and started to wiggle wires and got it to start.It tripped IAT,TPS,and Water temp codes.Unplugged the large connecter and found some "green" pins.Cleaned it as best i could.Runs good now and the upshift light on the dash is gone as are the error codes.

I'll get back to the a/f reading issue later,I'm just glad to get it running again.