Need help please!!

lagwagon21 · Post by **lagwagon21** » Mon Jan 17, 2011 11:13 pm

Ok, this problem is on my 93 Civic w a b16a. I took off my IM and TB, cleaned everything and now the car won't idle below 1500rpm, unless I blip the throttle, then it drops to around 900rpm for a couple seconds, then it goes back up to 1500rpm. And it also bogs down/ has no power when I drive it. I replaced the tb gasket, bled the coolant, everything is nice and tight. All of the vac lines are hooked up correctly. I have the idle adjustment screw on the tb all the way in, so it won't go any lower. I am not throwing any codes either. I'm at a loss here. It might be easier to explain over the phone. My number is 618-917-6042

Thanks, Chad

5thgen · Post by **5thgen** » Mon Jan 17, 2011 11:44 pm

Take your intake off.

There will be 1 or 2 holes (about 3/8" size) on the upper and/or lower sides, in front of the throttle plate.

Plug the hole(s) one at a time and see if anything changes. Top hole is IACV, and lower is FITV ( if you have one ).

If neither of these change anything, you almost certainly have a vacuum leak somewhere. Get some carb cleaner or something and start spraying around to see if the engine changes speed/rpm.

95_gsrfodo · Post by **95_gsrfodo** » Tue Jan 18, 2011 12:23 am

ya sounds like a vac leak u can find it by spraying carb cleaner or something like that aroung the intake and all like 5thgen said
and if idle changes have a leak.
i nstalled new gaskets correct and got all the old gasket off first and clean it?

lagwagon21 · Post by **lagwagon21** » Tue Jan 18, 2011 12:36 am

I plugged the lower hole and got nothing, guess cause the car was warm? I plug the upper(IACV) and I feel the vacuum, but the car doesn't die, it just idles down a bit. I am taking everything off again and gonna have to use some silicone. Would a bad enough vac leak make the car run like a turd and have no power at all?

fry · Post by **fry** » Tue Jan 18, 2011 2:49 am

that or when you doused the throttle body in carb/brake clean you fucked up the iacv.

lagwagon21 · Post by **lagwagon21** » Tue Jan 18, 2011 4:05 am

I went through it all again. Retorqued the IM nuts and everything else. Rechecked the IACV and checked that it works by putting power to it(the valve clicked). I removed the FITV and rechecked that it was tight. I am waiting for the silicone to dry then I am going to check the voltage on the TPS and fire it back up. Hope it works.

lagwagon21 · Post by **lagwagon21** » Wed Jan 19, 2011 2:22 am

My vac leak was from the bottom of the FITV. Sealed up ok for now, but I am trying to find another TB without the FITV because it is a PITA!!!!