little black box?

[daniel1]

i noticed on a friends 90 accord that there was a little black box mounted behind the headlight and beside the battery that has a plug and a vacuum line running to the throttle body what is it and what does it do. reason i ask is because i have a 90 accord as well and i dont have that but the wire is there to plug it in. thanks

[bruno8747]

Its a part of the intake system on the EX model. Its a baffel to quiet the intake and open up at a certain rpm.

[CrazyHondaOwnR]

I have a 90 lx and i have the box too ... any guesses why?

[blackcb7]

all models had those, i forgot what they were used for though

[John Conner18]

so is it a big deal if i unplug this box and the vacume line on my 91 lx its just in the way and i have an intake already

[Akira_kj]

That box its a control for starting the car in cold weather, if you look at what its connected to you will see a section of the intake that draws from inside the engine compartment. When the motor is very cold that valve opens and alows the motor to draw warmer air from near the engine rather than from the fender well. I would never leave a vacume tube open. Leave that box alone and just remove the interior piping. There is a sensor on that part or the part it connects to. So if you dont know what it does I would leave it alone..

This part is in a bad spot... I broke the vacume connection to it when i was installing a CAI. I ended up drilling out a small hole on the box to reseat the connection because it kept braking off when i just used superglue. Dont leave vacume tubes open, that hissing sound means your drawing air into your motor without a filter of any kind on it.

[John Conner18]

yeah i didnt wanna disconnect it anyawys thanks for the help

[sirs1ayer]

just plug the hole and remove it.

[accordaffair]

The intake air control system decreases air intake noise.

When the engine speed is below 3,500 rpm, the ECU supplies current to the intake control solenoid valve. This opens the solenoid valve sending intake manifold vacuum to the intake control diaphragm.

Basically it cuts off some of the air for the intake to use in order to quiet down the engine. From a performance point of view, remove it.

[shanesk88]

another question

just wanted to kno, how do you eliminate that little black box?, and is that the reason why my car lags under 3500rpm when you floor it off the mark, like theres not enough air or fuel going into the manifold?

[d112crzy]

it gives you vtec.lol

not all model have it, mine didnt. my car was bone stock when i got it.

[shanesk88]

u really answered my question buddy( sarcastic)

yep it gives me vtec!! (sarcastic again)

can someone really answer my question??? not someone tryin to b a smartass

[d112crzy]

it was answered in the first reply, learn how to read.

[accordaffair]

Remove it, be sure the plunger it controls is stuck in the up (open) position. Or instead of removing it entirely, just disconnect the electrical connector.

I don't know if it is causing your problem.

[shanesk88]

thanks accordaffair, it wont confuse the ecu tho if i just remove the wiring harness?