Maybe im just horrible at searching but I could find any results I was looking for.

Can you have the megasquirt control the ACV for emmisions?

 

There aren't really enough outputs for that. However it should be possible to pass without that by running a bit leaner than stock.

Ken

 

Hmm, I wonder if just having the air pump dump air into exhaust ports and into the cat all day long is the better choice.

Thanks for the reply.

 

I don't even use an air pump. I just tapped an ACV blockoff plate to take a Ford air injection check valve (needed a short length of pipe) and left it at that. The venturi vacuum of the exhaust gases going past the air ports in the exhaust ports is plenty.

Some OEMs do this, actually.

It is noit good for the converter since you don't have the ACV to kill airflow when you're not at idle/light cruise (read: outside the federal test loop) but you can always just cap it off. Or replace the converter with a glasspack when it doesn't have to pass emissions.

 

If outside air is going into the converter during heavy loads will these overheat the cats?

 

Probably. Mazda cancels air injection and runs the engines incredibly pig rich under heavy loads (or higher RPM) in order to save the converters. They can't convert if there isn't any oxygen in the exhaust... basically, if the engine isn't in the Federal test cycle, the air injection is bypassed and the engine is super fat.

50 miles of running with my systen had a half-plugged converter. A Mazda $2000 converter may have survived a long time, but I was using a guaranteed-to-fail $30 Catco piece of junk.