So in an effort to retain emissions since I have been driving around for years without, I have installed all the emissions components back. Currently have a racing beat full REVII exhaust with no cat (Will install one) and with the air pump connected i idle at around 16A/F. Driving down the street its just about anything above 16. Car idles and drives fine.

So at the advice of a friend which I didn't think will make a difference I removed the Airpump and low and behold it idles at 12.9 etc. Is there something wrong with the car? A stuck relay/solenoid? I wouldn't expect this to be this way. How can the stock ecu differentiate between extreme lean conditions?

Any ideas?

 

the "port air" that Mazda uses is in front of the 02 sensor, so it throws it off.

they avoid this being an issue by not running closed loop under a certain rpm and load.

zone chart is in the training manuals, and here http://www.turborx7.com/images/Technical/fuelzones.jpg

the training manuals usually also have the graphs for the ACV operation, Foxed.ca - Mazda RX-7 Manuals

since you have a more open exhaust than Mazda does you can probably dump the air pump air sooner than mazda did and go closed loop more

 

Thanks, that link is good info. Never read the training manual. Now this makes me wonder how well I can control closed loop with the adaptronic. I know that with the haltech since I was not running an airpump closed loop was easy. There was never any issues when I had emissions removed.

 

the Mazda ecu generally uses two conditions for a given thing, for example the ACV is run from rpm and throttle position (in fact the TPS test lights literally are the ACV solenoids)

the haltech can only do one thing, so it can only run the ACV on rpm OR load, but not both.

generally the Mazda system is elaborate, and the haltech would probably do ok

i don't know about the adaptronic