Hello

I had many problems with my car, it has bad mileage, the idle drop very bad when the car is warmed up, i feel the car is not running properly (full power) when i reset the ecu it goes good till the error comes again.

I will change the O2 for sure.

When i checked my car it appear 17, 30, 33 and 38 error codes! and recently 1 error code (change ignition coil - trailing??)
After that I realized I have no Air control valve

http://cgi.ebay.com/ebaymotors/Mazda...Q5fAccessories

I looked that error 30 and 33 are realted with air control valve.

Now, I need some advice, what should I do??
Get and install an air control valve or keep like this?
Change O2 sensor?

Writte any problem you think It will affect.

I would be very greatfull if you help me with this since Im from Peru and Its not easy to get good advices around (ppl who knows about rotary engines)

Thanks