What does disabling AIR actually do?
Thread Starter
TECH Apprentice
Joined: Nov 2001
Posts: 353
Likes: 0
From: Evansville, IN
What does disabling AIR actually do? I had my car tuned and the AIR system was supposed to be deleted. I haven't taken it off yet and I've noticed that it is always going. Is that what happens when you delete it? I would think it shouldn't come on at all.
Re: What does disabling AIR actually do? the point of deleting it is to take to take it out of your car. its like a 10# loss when u take it off. u need to have it if u still have cats on your car, if not, then rip the thing out of your car <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
TECH Resident
Joined: Jan 2002
Posts: 754
Likes: 0
From: USA
Re: What does disabling AIR actually do? IMHO,
there is no real performance gain from removing the AIR function.
Its sole purpose is ONLY to inject air into the exhaust for a maximum of 300 seconds in a cold start where the front O2s are not hot enough yet and would be reporting false rich condition so the injected air would make the O2s read a leaner exhaust until 02s are hot and fuel trim cells for cold idle ( cells 20 or 17) have moved to their operating cells of 19 or 18 which has different AFR.
On startup the PCM determines what the injector pulse width will be by what all 4 02s are reporting so by taking AIR out then PCM will build a pulse width that is believed is needed but will be getting incorrect readings from O2s.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Z00:
<strong> I had my car tuned and the AIR system was supposed to be deleted. I haven't taken it off yet and I've noticed that it is always going. Is that what happens when you delete it? I would think it shouldn't come on at all. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
there is no real performance gain from removing the AIR function.
Its sole purpose is ONLY to inject air into the exhaust for a maximum of 300 seconds in a cold start where the front O2s are not hot enough yet and would be reporting false rich condition so the injected air would make the O2s read a leaner exhaust until 02s are hot and fuel trim cells for cold idle ( cells 20 or 17) have moved to their operating cells of 19 or 18 which has different AFR.
On startup the PCM determines what the injector pulse width will be by what all 4 02s are reporting so by taking AIR out then PCM will build a pulse width that is believed is needed but will be getting incorrect readings from O2s.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Z00:
<strong> I had my car tuned and the AIR system was supposed to be deleted. I haven't taken it off yet and I've noticed that it is always going. Is that what happens when you delete it? I would think it shouldn't come on at all. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
