Just started playing with my flashpro this week.

I decided to load the Toda tune as I have the Torquie header, T1R straight pipe and sparrow 2.0 exhaust.

When I'm reading back the data, the AF is spiking when I'm changing gears or when I'm letting off the throttle. It's typically giving a read of 29.4 on the spike.

Is this normal for being off the throttle?

Sorry, just learning.

 

The injectors stop when you let off the gas, untill you get back on the gas or the RPM's drop to an idle. So this lean number is 100% normal. It's weird that it reads that lean though, most widebands read 10-20:1 A/F.

 

I have the secondary O2 sensor disabled, would that explain the higher readings?

 

no, whenever you go off throttle KPRO reads down to 32:1, don't sweat it, its normal

 

Cool, thanks to both of you.

 

You would see the same thing with the stock tune.

 

it is called de-acceleration Fuel Cut Off . for fuel economy and to make engine speed drop faster .

 

My 1995 GTI did the fuel cut on decel and I was going to ask if it would be ok to do this with the flashpro on the S2000 or if Honda already does it.

Clayton

 

To my knowlege, all modern factory ECU's do this. I'm sure all of the aftermarket ones do it as well. There's no reason to dump fuel into a cylinder that is getting zero air.