1995 Honda Accord "surging" idle..

Hey everyone, I was working on my 95 honda accord today trying to fid a
surging idle peoblem that has gotten worse lately. I start up the car
and the rpm goes from 1000 rpm to 3000rpm sometimes.

I logged on to google groups to find help from other people that have
had the same problem. I FINALLY FIXED IT! Since this is a common
problem in honda's I figured that I would log on and explain how I
fixed it.

Here's the deal:

***DO THIS FIRST: Buy a "Hanes" manual for the car that you own. Look
in the trouble shooting section for "idle surging" or something like
that. Go through all the tests they have in there. The manual is
prolly 9 Bucks at Auto Zone. GET IT, SO USEFUL!

There are two valves that controll air flow to the engine and can
affect idle:

IAC Valve: (Idle Air Controll) This is a $220.00 valve that bolts
onto the throttle body. It consists of an electrical motor and a
plunger that moves in response to a computer on the vehical someplace.
There are great instructions in the "Hanes" manual on how to test this
part.

FITV: (Fast Idle Thermo Valve) This one costs $55.00. This little
puppy is not electrical dependant. It is a "thermo" switch. There is
a wax plunger that expands when warm and shrinks when cold. When the
engine is cold, the valve is compleatly open, increasing the air flow
to the engine to warm it up faster. As the engine warms, the plunger
expands and lets less air into the engine to slow down the idle.

*****THESE ARE NOT THE SAME THING!!!!!! One (AIC) is bolted to the
back of the trottle body close to the wall of the dashboard. The other
one (FITV) is bolted to the BOTTOM of the throttle body. Each one of
these valves can be removed and tested and CLEANED WITH THROTTLE BODY
SPRAY. Always clean before buying a new valve. This is what I did and
I fixed my problem for FREE!

I tested the IAC valve and found no problems. I took it off and
cleaned it. I then took off the Fast Idle Thermo Valve and took it
apart to clean it. I discovered that the entire inside is supposed to
be screwed into place on the assembly. Apparently the center/core of
the valve has slowly, over time, juggled out and the air was leaking
through regardless of what the little plunger was doing.

So there it is guys, I just did this today so it is all fresh in my
mind. I hope this helps someone just like me that was struggline with
this issue forever!

-Nate

 

Hey im actually having the same problem right and i was just wondering how hard was it to take off the throttle body... im trying to do my own work on my car and i want to have an idea if i can do it or not. Thank you very much in advance for the tips

 

Check out Youtube. There are vids on how to remove the throttle body.