S2000 Under The Hood S2000 Technical and Mechanical discussions.

Air Pump removal=check engine light, anyway around the CEL?

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Old 04-17-2003, 06:15 AM
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What is the motivation to remove this piece? It can't be that heavy and it only runs during start-up. What am I missing?
Old 04-17-2003, 07:52 AM
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Originally posted by cdelena
What is the motivation to remove this piece? It can't be that heavy and it only runs during start-up. What am I missing?
You aren't missing much. Some of us unfortuantely have an aversion for anything which weighs anything but isn't made for structure, suspension, braking, or acceleration. A sickness.
Old 04-17-2003, 09:23 AM
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What's the advantage of removing the air pump assembly?
I mean, if there is no performance gains, why remove it?

When I bought my car the air pump was broken, I had to pay
$250 to buy a USED one (new is like $400+) to fix the CEL
that I had. The air pump CEL does not do anything to the car
but I hate driving the car around with CEL on, feels like something
is wrong with the car. So I say keep the air pump in there...
By the way, the air pump CEL does not come up for around one
driving cycle. I resetted my air pump CEL and the light went off
for about 100 miles of driving and it popped on again.
Old 04-17-2003, 12:03 PM
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Originally posted by OneQuickS2K
What's the advantage of removing the air pump assembly?
I mean, if there is no performance gains, why remove it?

When I bought my car the air pump was broken, I had to pay
$250 to buy a USED one (new is like $400+) to fix the CEL
that I had. The air pump CEL does not do anything to the car
but I hate driving the car around with CEL on, feels like something
is wrong with the car. So I say keep the air pump in there...
By the way, the air pump CEL does not come up for around one
driving cycle. I resetted my air pump CEL and the light went off
for about 100 miles of driving and it popped on again.

Originally posted by cdelena
What is the motivation to remove this piece? It can't be that heavy and it only runs during start-up. What am I missing?

The CEL coming on for the pump had nothing to do with milage, it's all about cold start cycles since that is when it turns on.

Reason for removing it is b/c it's in the way of brake ducting and since it doesn't contribute much to the performance of the car, I don't see it usefull in keeping it. It's strictly for emissions, I'll worry about it when I have to smog the car.
Old 04-17-2003, 12:04 PM
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[QUOTE]Originally posted by gernby
[B]Where do the air hoses from the pump connect to?
Old 04-17-2003, 01:01 PM
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Originally posted by vapors2k


I didn't plug them up. I left the brass hose open as it sucks up air on cold starts. Eventually, I'll remove all the hosing that goes to the intake manifold as I have been told that's where the hosing goes to.
The hose that goes from the pump to the intake pipe should be closed, or the intake will pull unfiltered air through it. I assumed that the output from the pump would go to something on the exhaust side, since it is providing air to the catalytic converter, right? If so, I would think that should be plugged as well.
Old 01-22-2007, 12:15 PM
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ok about 2 and half years already, any idea how to remove the air pump without CEL?
Old 01-22-2007, 12:39 PM
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Hm seems to me that perhaps you keep the relay in place with a resistor inline somewhere to fool the CEL, doesnt look like anyone found a proven solution though. Maybe ill see if I can figure out something when I remove mine being that mine is broken. I get a CEL so If i can remove it and cancel the CEL it should be good.

By the way there was a TSB on the pump for some of the AP1.
Old 01-22-2007, 02:29 PM
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The air pump monitor is too complicated to build a simulator for. The easiest way to eliminate it is to get a JDM ECU (Mugen Etc) that doesn't use OBDII emissions hardware or an AEM EMS.
Old 01-22-2007, 08:30 PM
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Originally Posted by Slows2k,Jan 22 2007, 06:29 PM
The air pump monitor is too complicagted to build a simulator for. The easiest way to eliminate it is to get a JDM ECU (Mugen Etc) that doesn't use OBDII emmisions hardware or an AEM EMS.
Do you or anyone else have a schematic (sp) of the electrical circuits in the air pump / harness? Is it in the helms manuel?

I'd like to take a look at it.


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