MicroSquirt.com read only forum (Jan.15,2018)

I havent run datalogs yet. This isnt happening from hard acceleration. I can be cruising at light load and just let off the gas and it does it.

So the EGO sensor switchpoint is what auto-tune aims for when AFR tables are disabled? What I'd still like to know, is the relationship between AFR tables and auto-tune.

Actually I did suspect the exhaust at first since I was running and open downpipe. But now I'm running a complete exhaust, cat converter and everything with no leaks. It probably is unburnt fuel, but how do I eliminate it?

I'm posting this in the general forum because I'm not sure if it's a fuel or ignition problem. Mods please move it to where you feel it belongs.

Anyway. I'm experiencing popping from the exhaust on deceleration/engine braking. I do notice that my AFR guage drops to full lean when I let off the gas ...

I'm trying to understand the relationship between GEGO, AFR target tables, and auto-tune and how they work together.

I gathered this much, that auto-tune uses 02 correction to correct rich or lean spots of the VE table. But what does it use as it's base value? Does it try to make everything 14.7:1 ...

gernoff, what are you using to control the opening and closing of the runners? My mazda has a similar setup, but I havent hooked it up yet.