alyhirji wrote:
>
> Hi Everyone. I jsut recently bought a 96 SI (5 speed) and dropped a used
> engine into it as the previous engine was seized (long story). I just put
> it on the road and all is well (so far). Two (minor) problems i've
> encountered are: High Idle speed when slowing/stopping down and after
> releasing the clutch. This happens after the car has been driven for a
> while. I've read other posts and have become sort of familiar with the
> IAC Valve. The O2 sensor on the car is new. Could the IAC be the
> problem? How do I remove it and should I replace part of it (which part)?
> Should I replace the whole thing? Should I clean it? How? !!

Setting the idle is not entirely trivial. The procedure varies with
model year and engine code, and it is not the same for the entire 96 -
00 generation Civics. If you don't follow the proper procedure for your
particular engine, you will get problems like you describe. What engine
do you have in the car now?

It is conceivable that the IAC is partially blocked, and that the idle
adjustment screw is opened too wide to compensate for this. The IAC can
be cleaned with throttle body cleaner.

If you try re-adjusting the idle, make sure you find the right idle
adjustment screw. On the throttle body there is a throttle stop screw
that looks and works like the idle adjustment screw on old carburetor.
This is NOT where you adjust the idle, and the factory manual has big
warnings about not touching this screw.

>
> Problem #2: The heating controls are all messed up! When I select the
> button for the windshield (front) defrost, the vents from the dash start
> blowing, when I select the vents only, the front windshield defrosters
> start blowing!! What could be the cause of this??

Someone else posted about this problem quite some time ago. There is a
mode control motor on the air handler. The air hanlder is under the
millde of the dash, and the mode control motor is on the left side of
the air handler. Thie motor assembly has a mode encoder in it, any
chance that the encoder has rotated out of position?