fnckr

Is it possible to delete a COV?

Specifically, looking to delete COV 1 and 2 that control the Sound Symposer and Air Box Helmholtz resonator.

The vacuum tubing is easy to reconnect for continuity to the rest of the system. However, I suspect the missing COV will throw a code through the electrical system. Is there a resistor or some other mechanism that can be wired to the harness to make the system think the COV is still there?

AdamSanta85

You dont need to delete them but you cap off some off two of the ports. The AFE intake removes the Sound Symposer and Resonator...

fnckr

Yes, I agree. However, it would be nice to not have two useless valves sitting there.

fnckr

Would adding a resistor of 28.5 ohms trick the system into thinking the COV is there and functioning? Please see the below pic from this link Pierburg Service Bulletin Switch Over Valve. This is the company that makes the change over valves for Porsche. What is posted is for Volkswagen, but I suspect they are similar internally. Additional bulletins are available at this link, Pierburg Service Bulletins, specifically SI 0050, SI 0051, and SI 0052, which all apply to “switch over valves.”

Catharpin

Is this only on the S and not on all cars?

fnckr

All of them have the sound symposer and resonator flap COVs. The S has the exhaust COV regardless of having PSE or not.