A4driver1point8

I have codes P0507, and P0171. I have replaced the air filter, removed and cleand the MAF. ( ALso I have tried running with the MAF unplugged and idle stays the same....horrible.) I cannot find a single torn hose and I have looked everywhere. The only air noise is coming from the pancake valve....which it is the small hole on it that releases air. Anyways I cleaned that as well. Also, every ten or fifteen seconds usually at my incredibly awesome dying idle...I get this humming sound from the front passenger side of the car (FRONT not REAR). I am at a loss here guys.

MikTip

...<ul><li><a href="http://wiki.ross-tech.com/index.php/16885/P0501/001281">http://wiki.ross-tech.com/index.php/16885/P0501/001281</a</li></ul>

heateris

maybe your fuel pump is dying or the injectors are clogged or malfunctioning. they also have bunch of electrial tests you can do.

the latest version does not let me cut and paste information. the old version does not have the code info. sorry...

MikTip

...<ul><li><a href="http://wiki.ross-tech.com/index.php/16555/P0171/000369">http://wiki.ross-tech.com/index.php/16555/P0171/000369</a</li></ul>

MikTip

-<ul><li><a href="https://forums.audiworld.com/a4gen2/msgs/1092900.phtml">https://forums.audiworld.com/a4gen2/msgs/1092900.phtml</a</li></ul>

A4driver1point8

Changed it recently.

A4driver1point8

What about the secondary air pump?

rccks96

Have you logged g/s (channel 2 i believe)?

A4driver1point8

If it was dead...would the idle not be changed?

MikTip

<center><img src="http://pictureposter.audiworld.com/6607/sensor.jpg"></center><p>Are you DIY'n this, or relying on a shop?