i was wondering if the j-spec AVC is the same as the american version. along with all the piping and tubing. will it pass smog ?..

-thanks.

 

ACV? Yes

 

The only difference I can think of is The J-spec ECU will not care if it's disconnected.
The A-spec ECU will throw a code if dosen't see the ACV solenoids.

 

The J-spec ACV is not the same as the US one. It's similar, but it's not the same. The relief connection is in a different location (so the relief hose is longer) and there's no split air solenoid. Whether you'll pass emissions with one is anyone's guess. I'd say it probably wouldn't make that much difference, but it depends on the test procedure.

What makes you think the J-spec ECU won't throw an error code?

 

My J-spec supplier, Shane at RotaryWork.com told me.

Of course, he was the one that first mentioned the Cosmo AFM.
So this is "*** grano salis".

 

My ecu doesn't throw codes and none of my solenoids are connected. Unless there is a seperate test for emissions codes?(I used the 2 led system on the test plug)
I am S4 which doesn't care as much though. Don't know about S5 ECU's.

I passed with my S5 Jspec ACV on the dyno smog test. Although I did gut the ACV diaphram

Airpump,cat,and ACV constantly pumping to cat == VERY low emissions

 

what makes you think it does.

 

The series four ECU does not have a code for Split Air Solenoid. The author of the thread has a series five.

If you have a S4 with a JSPEC ACV you'll pass emission. The lack of a Split Air Solenoid has squat to do with passing emissions. As long as the rest of the ACV is functional and the airpump is working AND the catalytic converter is good, there is no problem. The air pump goes to the exaust ports area of the engine where it counts.

IF you have a S5 with a JSPEC acv, and the emissions checking station checks for codes, maybe you can take the split air solenoid off the old acv and connect it to the harness and tie it out of the way/sight so it does not throw a code.

 

Now how did we come to he has an S5? I know jack about the S5 emissions anyhow.

 

The J-Spec ECU's check engine light also never work.... at least for me...

 

Well, he's trying to keep it a well kept secret, but he slipped up the other day. He had a thread that asked where the EGR is on a S5. So, I put two and two together and came up with three and decided he has a S5.

So??? You know Jack about S5 emissions OR you don't know Jack about S5 emissions? You say you know Jack, but Jack is a friend of mine and he says he does not know YOU. humor

 

The S4 ECU's self-diagnosis system is much simpler than the S5's, and only looks at the input sensors. It doesn't look at any of the emission controls.

The S5 J-spec ECU has the same self-diagnosis system as all other S5's. Why wouldn't it?

Apart from the lack of EGR they're basically the same as S4's.

J-spec S5's didn't have a check engine light, so the J-spec ECU won't be programmed to drive one. That doesn't mean the ECU doesn't generate error codes, it just means you have to use a code reader or LED plugged into the diagnostic connector to read them. Remember the S4 doesn't have a CEL either.