Is the Air Pump really useless/not needed?
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Is the Air Pump really useless/not needed?
I've done some research, and what I've gathered is that the secondary air pump is an emissions-only piece of equipment that is not really needed for operation of the car, and its whole purpose is to inject air into the catalytic converter at start up until it gets to operating temperature to lean out the Air/Fuel mixture. Most of the information came from this thread: CEL410
But how useless is it really? I've got a test pipe and a wideband, and I'm running a Greddy turbo system with emanage ultimate. I'm getting the p410 cel telling me my secondary air pump is bad, but I'm also getting correspondingly low AFRs at startup. Seems to me the two things are related. Now I know from talking to a few emanage tuning experts on here that my overly rich mixture at startup idle can be largely corrected by open loop tuning (LTFT, STFT, blah, blah) and the conclusion is that I'll probably need to get my system retuned again. My AFRs are good everywhere else (14.7 cruise, 11.5-12 WOT, 14.5ish at partial throttle, etc), but cold idle I'm way down in the 11s until it gradually increases to mid 13s. The 13s at idle are a function of my tune, but couldn't the fact that I'm seeing 11s at startup and cold idle be related to the p410, or otherwise air pump failure?
I'm asking because I'm not going to run out and replace the part if it is going to make no functional difference on my AFRs. I'd rather spend that cash on getting another tune.
But how useless is it really? I've got a test pipe and a wideband, and I'm running a Greddy turbo system with emanage ultimate. I'm getting the p410 cel telling me my secondary air pump is bad, but I'm also getting correspondingly low AFRs at startup. Seems to me the two things are related. Now I know from talking to a few emanage tuning experts on here that my overly rich mixture at startup idle can be largely corrected by open loop tuning (LTFT, STFT, blah, blah) and the conclusion is that I'll probably need to get my system retuned again. My AFRs are good everywhere else (14.7 cruise, 11.5-12 WOT, 14.5ish at partial throttle, etc), but cold idle I'm way down in the 11s until it gradually increases to mid 13s. The 13s at idle are a function of my tune, but couldn't the fact that I'm seeing 11s at startup and cold idle be related to the p410, or otherwise air pump failure?
I'm asking because I'm not going to run out and replace the part if it is going to make no functional difference on my AFRs. I'd rather spend that cash on getting another tune.
#3
being a little rich at cold start up is normal
11's is a little too rich.. but i'd say 13's cold start up is ok.
I don't have an air pump in my car and i idle at around 13.0-13.5 on cold start.
i'd say you should adjust your tune and forget about the pump.
11's is a little too rich.. but i'd say 13's cold start up is ok.
I don't have an air pump in my car and i idle at around 13.0-13.5 on cold start.
i'd say you should adjust your tune and forget about the pump.
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Never even heard of such a thing, but I'm interested in hearing more. I don't want to throw money at this if it isn't something that will fix my issue though. What's the delete kit supposed to do (besides the obvious of deleting the air pump)?
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I'm definitely going to get my open loop AFR's tweaked by a different tuner, and I'm also thinking that switching out to ID injectors (and tossing these RCs) will help as well. I don't want to get retuned until I get the new injectors though, so in the meantime I was just thinking that maybe my p410 code was somehow related to my cold idle AFRs and if I fixed the air pump issue, I could lean out my cold idle.
#6
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Originally Posted by DFWs2k' timestamp='1319215569' post='21090135
How about you get an izze racing air pump delete kit?
I have one FS with a block off plate. PM me.
Sent using free Tapatalk - Android FTW
I have one FS with a block off plate. PM me.
Sent using free Tapatalk - Android FTW
Worst case scenario, you hook up the kit (which costs less than a used air pump), CEL still shows up, you remove (unclip wires) and resell.
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