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AEM cold air intake - bad performance

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Old Apr 12, 2002
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AEM cold air intake - bad performance

Greetings fellow Civic owners,

I have recently installed the AEM CAI on my 2002 Civic SI (CDN), and now it feels as though all my low end torque is gone. And as for the
high end, its hard to tell, i think there i a bit of improvement. For the money i spent i am kind of disapointed, i really enjoyed the torque i used to have, its great for city driving, now it just seems like the car just makes a lot of noise [IMG]i/expressions/face-icon-small-tongue.gif[/IMG]. Is this normal, or is something wrong here? Can anyone offer some advice?

Thanks.
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Old Apr 12, 2002
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you have manual or automatic?
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Old Apr 12, 2002
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check out this page on the civic ex with hayame intake
import tuner
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Old Apr 12, 2002
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it does take a little away from the low end...should add a little at mid-high end...

P.S. make sure you check your oil often, the CAI burns oil way more than stock!
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Old Apr 12, 2002
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<< you have manual or automatic? >>



Manual.
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Old Apr 12, 2002
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sounds nice when you hit vtec now eh?
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Old Apr 12, 2002
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<< sounds nice when you hit vtec now eh? >>



By hit vtec, im assuming you mean full throttle? (7th gens have i-vtec right?) And yeah, it sounds nice and beefy [IMG]i/expressions/face-icon-small-smile.gif[/IMG]

Ok BTW,what you mean the CAI burns oil? Im under the impression that in a healthy engine, no oil should be being burned.
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Old Apr 12, 2002
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Also, while were on the topic. Do you guys know what implications such a mod will have on warranty?
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Old Apr 12, 2002
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<< it does take a little away from the low end...should add a little at mid-high end...

P.S. make sure you check your oil often, the CAI burns oil way more than stock!
>>




How does it burn more oil?????

you shouldn't be burning any oil
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Old Apr 12, 2002
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yeah I mean when vtec kicks in...i have an Lx so I wouldn't know on the Civic, put I had a '01 Prelude with the AEM CAI, and as soon as I hit 5500 RPM, holy **** did it sound sweet...

well I meant since there's more air going in it's using more oil...it's happening in my friends SiR, that's all...maybe he needs a tune up...[IMG]i/expressions/laugh2.gif[/IMG][IMG]i/expressions/laugh2.gif[/IMG]
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Old Apr 12, 2002
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wait for your ecu to get used to it, it'll be better
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Old Apr 12, 2002
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<< By hit vtec, im assuming you mean full throttle? (7th gens have i-vtec right?) >>


no only the 7th gen civic si has i-vtec
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Old Apr 13, 2002
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engines burn oil when they need a rebuild, not when u add an intake, when u add an intake it increases air flow, thus combustion, thus maybe fuel consumption. Peace
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Old Apr 13, 2002
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did that foo just say 7thgen's have i-vtec (lol) nah only rsx-s and new si's have i vtec i have the rsx-s and the differance is SOO noticable its not funny
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Old Apr 13, 2002
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<< wait for your ecu to get used to it, it'll be better >>



Intresting point, since i installed it, i have been seeing a slight and gradual increase in performance.
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Old Apr 13, 2002
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<<

<< By hit vtec, im assuming you mean full throttle? (7th gens have i-vtec right?) >>


no only the 7th gen civic si has i-vtec
>>



Ok, im confused here. I have a 2002 Civic SI(G), Canadian version. So for you yanks, i think that would be an equivelent of an EX, with all the options. On the engine it does say 'vtec', not 'i-vtec'. However, i do not hear an engaging sound or the instant torque increase at ~5000 rpm, like on older generation hondas/acuras. So, what the hell do i have? [IMG]i/expressions/face-icon-small-tongue.gif[/IMG]
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Old Apr 13, 2002
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regular ole v-tec
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Old Apr 13, 2002
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We have regular vtec in the EX which changes over at ~4,500 rpm. It's very mild so you wouldn't really feel it. As for burning oil?? Many people including myself have noticed a drop in fuel mileage with the intake, maybe thats what your friend meant.
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Old Apr 13, 2002
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it kicks in at 4300 and you can hear it slightly... although i can hear it kick in louder with intake installed.... let your ecu adjust, i drove about 200miles "294km" before i can really feel a difference.
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Old Apr 13, 2002
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An intake will not make you burn oil, an intake will make yoru car run RICH. Which makes black smoke come out of your exhaust pipe under hard acceleration. Your car runs rich since it dumps in more fuel to compensate for more air which your car wasn;t really designed for. Aftger a few more mods, say I/H/E/Pulley, I would use a VAFC like I have in my car to alter the fuel curve to compensate for the modifications. I did that, no more running rich, no more black smoke. Also use some "HONDA SAFE" fuel cleaner w/ every oil change to avoid carbon buildup.
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Old Apr 13, 2002
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If your ECU isn't able to adjust the fuel flow, then you will run lean, which means hot, which may burn oil, and later things like pistons and valves. Oil smoke, if any, would be blue.

I think with the additional air, the ECU should adjust fuel flow enough to keep the same mixture balance and not run rich. I would suggest that if you are blowing black unburned fuel smoke, there is a problem.
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Old Apr 14, 2002
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[IMG]i/expressions/face-icon-small-confused.gif[/IMG]

When you installed you CAI, did you atleast RESET your ECU? I noticed an increase in low end bite, and my sound starts up at around 3000RPMs, honestly.

Mid and high end revvs are as beefy as I'd want it to be;

Resetting basically speeds up the process of your ECU adjusting over time. It was in the Mega DIY listing and so i did it- i don't know how it feels like for the ECU to eventually adjust, but my ride (1.7) feels like it's breathing much more easily.

BTW, doncha love how it sounds at 4th-gear VTEC? drool.....

Peace:[IMG]i/expressions/face-icon-small-blush.gif[/IMG]
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Old Apr 14, 2002
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I'm not so sure that ECU reset does all that much good. I think it just takes all the settings back to some default level. I didn't like the mileage with my AEM SRI so I went back to stock, reset the ECU with no improvement. Then after driving about 600 miles, the gas mileage came back to where it was before I had installed the SRI.
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Old Apr 14, 2002
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I don't understand the fuel problems. After I installed my CAI without reseting the ECU there was a small drop in milage. But after I car got used to the CAI there is an increase over stock. I calc my miles every time. I do feel a gain in higher rpms and a small loss in the lower. But the cool thing is you can hit the gas in lower rpms without lugging the engine.
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