Emission failed. AIRPUMP direct to Cat without ACV??
 

Hi everyone! (sorry my bad english... :blush: ) I failed in the emission test :(, obviously I had not any catalytic.

Now I installed a catalytic converter, I have the airpump connect to the manifold, but I haven´t the ACV.

ACTUAL - So my setup now is this one:
https://cimg5.ibsrv.net/gimg/www.rx7...c93e9fd271.jpg

OPTION A - So, could be work the next setup???:
https://cimg6.ibsrv.net/gimg/www.rx7...939c7dcd90.jpg


OPTION B - If not, could be work directly from airpump to cat?? Will I need cap the red part?
https://cimg7.ibsrv.net/gimg/www.rx7...49397cf72d.jpg



Other question is the catalytic, because the CAT that I bought has two air injections... why?? must I cap one? Use both? whaaat?!!?
https://cimg9.ibsrv.net/gimg/www.rx7...0eef5f55c6.jpg




Thanks everyone!!!

I'm pretty sure you want to use #1 for hooking up the air pump and cap others. I have no idea what they do for emission tests in your area. Do they run your engine just at idle? Do they put it on a roller and have it go some fixed speed like 50 km/h ?

I think if you block off the ACV completely you don't have any choice but to put it right to the cat. So option B. I think you need to cap it, but it's hard to say from the picture. I don't have the car in front of me. Or you should be able to put the ACV back on, not hook anything up to it (no vacuum lines or electrical connectors) and it will flow air to the cat all the time.

https://www.rx7club.com/attachments/...e-fd_acv_1.jpg

https://www.rx7club.com/attachments/...v_actuator.jpg

https://www.rx7club.com/attachments/..._operation.jpg

Thanks! It´s really helpfull your info!

My emission test is CO in idle, CO in accelerated Idle (between 2000-3500rpm approximately) and LAMBDA in accelerate idle.
Lambda must be min 0.97 - max 1.03 (in the failed test were 0.85).

I´m not really sure what mean "FEEDBACK" (my bad english :( ) But I think that in mode "Feedback LOW SPEED LIGHT LOAD" is my accelerated idle... right? So I need for pass the test a portion of the air pumped... maybe? :S

Thanks again!

Accelerate idle. So you mean high idle speed. Does the vehicle move on a machine (dyno) or does it not move?

Do they test HC or NOx?

I think you just need to get the air pump working. Feed back means oxygen sensor is controlling lambda. No feedback means computer controls lambda without oxygen sensor. Idle speed is never oxygen sensor on an Rx7. But if the vehicle is moving on a machine (wheels turn, on a dyno) it is different.

CO emission is controlled by lean or rich. Lean is low CO. Rich is high CO. HC and NOx are more complicated.

Not hc or NOx, only CO and lambda(they read the lambda in the muffler (end of the exhaust).

I mean high idle speed (not dyno or moving) in 3000rpm.

Thanks mate!!! :)

ok. i think you will be fine if you just get the air pump working with a cat, whether it's bypassing the ACV or not. That will fix the lambda and the CO emissions.

thanks again! I will write the results.

Bye!