Got rid of the catalytic converter will Alientech Powergate 3+ handheld device from vividracing fix my struggling ecu or is something else better I cant find a cobb ap what are my options other then an insurance claim

 

What makes you think you have an issue with the ecu? What issues are you experiencing?

 

It sounds and acts like it has a miss I asked a mechanic friend of my to mess with it a little he said it could be the injectors but when I told him I got rid of the catalytic converter he said the ecu is probably having trouble with the air to fuel ratio and I need to get it flashed I've been looking into mazda edit but never owned a rotary so I figured I ask you guys the compression test was good I replaced all the ignition coils plugs and wires every now and then I throws up a miss fire code as well as the o2 sensors which are brand new but when I clear the code the shut it of and turn it back on the the misfire code doesnt pop up just the o2 sensors do I dont mind dumping money in it lol but I'd like to get it to run right

 

The engine only has 30000 miles on it and I plan on replacing the motor mounts to cause the car itself has 143000 and idk when that was done

 

Never talk to this mechanic friend again, his response males no sense. If the ECU is having trouble you need to find and fix the issue, reflashing it won't accomplish anything.

Do you have the stock intake? Aftermarket intakes can cause idle issues. Are there any open hoses under the hood or obviously vacuum leaks?

Also please be clear in your writing. You cleared the misfire code, and it didn't come back, so you only have the catalytic converter code, as expected. Is that accurate?

Under what conditions does the misfire code back, of at all?

 

Oh good i just spent 400 for the mazdaedit and tactric for nothing... It's a stock intake but the exhaust manifold is 2.75 with cat backs and no theres no vacuum leaks that I know of but I didnt think about the vacuum and the codes state the following
p0131 o2 sensor circuit low voltage bank 1 sensor 1
p0031 ho2s heater control circuit low bank 1 sensor 1
p0031 ho2s heater control circuit low bank 1 sensor 1
p0300 random/multiple cylinder misfire detected

 

And how would I find and fix the problem with the ecu

 

You don't. You don't have a problem with the ECU.
The first 3 codes are for your uplugged rear O2 sensor. Nothing you can do about that, but you may be able to suppress them with the MazdaEdit.

With your scan tool, can you check the reading of airflow g/sec, AFR, long term and short term fuel trim on a fully warmed up idle. Nothing else. just idle

9 times out of 10 its a vacuum leak, the fuel trim values will confirm/exclude that.

 

I run a catback exhaust with no CC and I am able to use both O2 sensors. Could be that the sensors are bad and the ECU doesn't have the data to run properly. The only code you should be getting with a catback is P0420.

Edit: O2 sensor setup should look similar to mine.

 

Bank 1 Sensor 1 is the front O2 sensor. Bank 1 Sensor 2 is the rear O2 sensor.

Either the front O2 sensor is bad, unplugged, or has a wiring problem.

DTC P0031
DTC P0131

Since the front sensor is what the engine uses to trim fuel, I'll bet dollars to donuts if he fixes that problem, the car will run fine.

Also, what Loki said about never talking to that "mechanic friend" again. He doesn't know his *** from a hole in a block.

 

Agreed, its definitely an O2 sensor issue based on the codes. Also makes sense that this would cause the engine to run poorly. All signs point to your O2 sensors being the issue.

 

All agreed the I will replace the o2 sensors in the front and in the back if the front doesn't fix it but I'm also looking for motor mounts are the progi mounts good? Or are they junk

 

Go OEM Mazda for engine mounts. It's an extremely important part of the car.

 

So on this car its preferred to stick with oem parts other then the catalytic converter due to the carbon back feed correct

 

It depends what part you are talking about. A gear shifter? Go aftermarket. A part that is critical to the correct functioning of the engine? Go OEM.

 

Roger on that I'll check in if the o2 sensors dont work I appreciate the help fellas

 

No problem, happy to help out. Keep us posted on your progress. Good luck!

 

Hey where do you guys order your o2 sensor the last ones I ordered was junk

 

Only buy OEM for O2 sensors. Mazmart works well enough. https://shop.mazmart.com/en/rx8-oxygen-sensors

 

ya I made the mistake of not doing it the first time lol

 

Sometimes have to learn the hard way with this car. It can be a bit finicky. I made a lot of the same mistakes you've made and more, trust me