DIY * Injen CAI install * Si

[06blaksi]

Originally Posted by tek9j

I think you forgot the part where you had to disconnect the negative battery pole. Also, I installed an AEM CAI and now my check engine light is coming on. I unplugged the battery, check the sensor plug, pushed the wires in, plugged the sensor plug back in till I heard the snap, plugged the battery back in, let it idle and the light stayed off until I got to work then I came back on when I went on my lunch break. The install is exactly how you have it here with hoses, placement and everything. Any ideas what could be causing the check engine light to come on?

Sounds like you have the first run of AEM intakes which were throwing CEL's. Injen has never thrown one. If you have an earlier AEM, i would recommend changing it

[tek9j]

I just bought this AEM intake brand new online. I was gonna go with injen but chose to go with AEM because they were the only one I could find with the two piece setup so I could possibly put the bypass valve in between so it won't suck in water. So is this a known problem with AEM or was it a known problem before? The model I have is the 21-519.

[mad monkey]

It's new for us Honda's because of the MAF setup. But it's the first outcome of the AEM intakes that throw the CEL's. If you're brand new, just go get your code checked... it's free. See what the code actually is. For all we know it can be something else.

[tek9j]

Originally Posted by mad monkey

It's new for us Honda's because of the MAF setup. But it's the first outcome of the AEM intakes that throw the CEL's. If you're brand new, just go get your code checked... it's free. See what the code actually is. For all we know it can be something else.

I just got my code checked and the code is "P0172 System Too Rich". I got it turned off too but I know eventually its gonna turn back on. I guess the intake is making the fuel burn rich. I thought the car was already burning the fuel rich cause I see that black residue on my exhaust tip since I got the car after I put a few miles on it. Can I do anything about this code?

[mad monkey]

Originally Posted by tek9j

I just got my code checked and the code is "P0172 System Too Rich". I got it turned off too but I know eventually its gonna turn back on. I guess the intake is making the fuel burn rich. I thought the car was already burning the fuel rich cause I see that black residue on my exhaust tip since I got the car after I put a few miles on it. Can I do anything about this code?

Well the fuel itself doesn't burn rich. Without technicality, it just burns. It's the amount of fuel determined from the ECU that regulates whether you run lean or rich. And the black "soot" on your exhaust tip is just carbon. It's the residue from the exhaust itself. Every exhaust you see will have a black tip. If it's white, then they're most likely running C16 race gas or any equivelant. Seems like you've got the older version of the intake. Go buy some cams to help compensate you running rich . Other than buying another intake of the revised family, you really have no other choice than to live with the light or hope that it doesn't come on.

[tek9j]

Originally Posted by mad monkey

Well the fuel itself doesn't burn rich. Without technicality, it just burns. It's the amount of fuel determined from the ECU that regulates whether you run lean or rich. And the black "soot" on your exhaust tip is just carbon. It's the residue from the exhaust itself. Every exhaust you see will have a black tip. If it's white, then they're most likely running C16 race gas or any equivelant. Seems like you've got the older version of the intake. Go buy some cams to help compensate you running rich . Other than buying another intake of the revised family, you really have no other choice than to live with the light or hope that it doesn't come on.

Wow... okay. I guess I'll call AEM and see if I can have it returned so they can send me a good one because when I called the AEM tech he said that the check engine light shouldn't come on. So I'll see. Thanks for the info. As for the cams... I heard that the cams already on the si are the best cams calibrated for that engine. So you could get cams but the ones on the engine are already the best you can get for the k20z3.

[mad monkey]

Originally Posted by tek9j

As for the cams... I heard that the cams already on the si are the best cams calibrated for that engine. So you could get cams but the ones on the engine are already the best you can get for the k20z3.

Wrong... we cams we have are pretty high up in the performance ranking, but are far from the best. A mild upgrade is the 06+ TSX cams which give a little more lift than ours. Then after that you'd move to the aftermarket side. Buddy club, Crower, Skunk2, etc. Unless you own a ferrari, or a 100,000+ car. There are better cams out there for your motor lol.

[The C Tripp]

very nice, i have an EX and i had my friend Jose do it for me (he has an Si) but he's a mechanic anyways but whenever i upgrade, i would like to do it myself!