1994 Accord Intake
 

Yesterday I put the stock intake back on my 94 accord, and the only Vacuum hose not connected is the one that connects to the IAR vacumm tank? which i believe i am missing. is this the tank that connects to the box with the filter and goes down into the bumper? Everything but that is hooked up correctly and at about 2000 rpms or so the car shakes and feels like its struggling. Could that hose be causing this?

Bump..

Is it one of these? I'm not too familiar with that stuff on a 94...
http://www.hondaautomotiveparts.com/...v401_b0107.png

This picture is from an EX; I don't think the LX has that.

Yes thats it! thank you.. it is number 21 that isnt plugged to anything..

I think #9 is just a vacuum reservoir, so any kind of bottle of roughly similar size should work. Just so that it doesn't collapse under vacuum (and with engine-heat).

I'm still not really sure how that would cause your original problem, but it seems pretty easy to try some kind of bottle & see what happens.

Would plugging the hose have the same affect?

The reason i think its the intake is because it only started happening right after i changed from an aftermarket intake back to stock..when the aftermarket intake was on it threw a code for EGR and idled funky..do you think the aftermarket intake could of messed something up?

Plugging isn't the same -you need a reservoir volume.

Not sure how the EGR would be related to that...?

I am just wondering weather driving it around for a while with the aftermarket intake with a few plugged vacuum hoses and the CEL on for EGR could of messed something up?

Well i unplugged the EGR vacuum line and plugged it with a screw and it no longer shakes..

Seems like that vacuum chamber #9 is needed just to operate something in the resonator #3. Should be unrelated to the EGR. So it seems like the EGR is your problem.