Need help with ECU

SouthArk370Z · 07-26-2018, 10:33 PM

Quote:

Originally Posted by Blackcrimzon

... All they do is hook up the machine and then run something and you get a pass or fail. The inspector never looks under the car or under the hood. AZ is pretty easy on the smog check.

That should help. Some states are real sticklers.

Quote:

Originally Posted by Blackcrimzon

... Do I need to have someone code them back in or do I need a new tune and a new ECU?

The ECM has to think that the emissions system is ready and functioning properly before it will give the ready signal via OBD. I'm not sure exactly how the ECM does that but it takes several drive cycles (with everything working properly) before it will give the signal.

My guess is that you will need a stock ECM in order to get the system ready signal - but I don't know. The person that did the existing tune should be able to tell you what you need to do to pass the smog test. If you can't get a response from him, then I'd look for a tuner that is familiar with your ECM.

Blackcrimzon · 07-27-2018, 03:20 AM

Quote:

Originally Posted by SouthArk370Z

That should help. Some states are real sticklers.

The ECM has to think that the emissions system is ready and functioning properly before it will give the ready signal via OBD. I'm not sure exactly how the ECM does that but it takes several drive cycles (with everything working properly) before it will give the signal.

My guess is that you will need a stock ECM in order to get the system ready signal - but I don't know. The person that did the existing tune should be able to tell you what you need to do to pass the smog test. If you can't get a response from him, then I'd look for a tuner that is familiar with your ECM.

If I bought a used ECU off of ebay plugged it in and then reinstalled my cats along with putting in some stock intakes but leaving all my other stuff in the car would that allow me to pass?

SouthArk370Z · 07-27-2018, 06:34 AM

Quote:

Originally Posted by Blackcrimzon

If I bought a used ECU off of ebay plugged it in and then reinstalled my cats along with putting in some stock intakes but leaving all my other stuff in the car would that allow me to pass?

I don't know. Maybe someone with experience doing ECM swaps will chime in.