i have a whole in the throttle body with thread for some kind of screw, when i put my finger it sucks it in . and i start hearing all the air passing thru my air intake. my car has always had a shssss sound in the intake when i turned it off, i covered that whole in throttle and the shsss when away when i turn it off. do i need the whole cover , caude i can of like the shsss sound coming out of my intake when i turn it off.

 

Where exactly is this hole located on the t/b? Are you talking about INSIDE the t/b, like the hole marked lower port in this pic:

If so, that's supposed to be there, and if your intake is modified, then the sound of manifold pressure going from vacuum back up to atmospheric when you turn off your car will sound like a whistle as the air moves thru your filter element.

If the hole is on the exterior of the t/b, then its exact location would help in determining its purpose.

There shouldn't be any holes on the exterior of the t/b that would "suck in air", unless your MAP sensor isn't in place, and then you would know with the CEL blaring in your face.

See if you can pinpoint the location of your "hole" in this pic:

 

yes i see it theres a hose that goes there i see it in the pic but i dont know the name.the whole its right on top of were the intake connects to the throttle body.

 

Ohhhhhhh, I know what you're talking about.
That's the idle adjuster screw. If yours is missing, you should get a new one. Your car must be idling kinda funky without it.

 

It's #1 in the second pic above...

 

yeah thats what it is , is it expensive is it bad for my engine not having that screw there. thanx for helping me out

 

$5.85 from Majestic Honda(http://www.hondaautomotiveparts.com). Should be no more than $8 from the dealer.
29444 001 1 SCREW SET NO COLOR 7.79 5.85

You need it to maintain the correct idle speed, otherwise you'll probably idle a bit high. Plus, you don't want dirt and debris getting thru that hole.

 

thanx bro u helped me out alot, i bought it today. whats the highest to iddle my throttle.

 

Your idle speed should be on the sticker that's under your hood.
It's usually something like 750 +/- 50RPM for automatics and 670 +/- 50RPM for manuals.

Make sure you let the car warm up before you try to adjust the idle, otherwise the IACV will keep you from getting a constant idle. It might also help to jump the service connector. Other than that, you turn the screw in to lower the idle and out to raise it.

 

if iddle keep comming up and down when gear is in neutral at trafic light (honda accord automatic trasmittion '98) What is the problem and how do i rectify this