Honda Car Forum

#1 (**permalink**) 01 Feb 2004, 07:11 am

I am buying a 1999 Accord with the V6. The idle is oscilating between 1100 and
1900 rpms at an idle after it warms up. The check engine light is also on. Any
ideas? How hard to fix? Cost? It is at an auction, so if I want the car I have
to fix it myself.
Thanks
Bill
Ultrastryk@aol.com

#2 (**permalink**) 01 Feb 2004, 02:33 pm

Possibly a bad oxygen senor? What code are you getting?

"ULTRASTRYK" <ultrastryk@aol.com> wrote in message
news:20040201071128.27200.00001350@mb-m11.aol.com...
> I am buying a 1999 Accord with the V6. The idle is oscilating between 1100
and
> 1900 rpms at an idle after it warms up. The check engine light is also on.
Any
> ideas? How hard to fix? Cost? It is at an auction, so if I want the car I
have
> to fix it myself.
> Thanks
> Bill
> Ultrastryk@aol.com

#3 (**permalink**) 01 Feb 2004, 03:28 pm

>
>Possibly a bad oxygen senor? What code are you getting?
>

Haven't had the codes pulled yet. I guess that is the first thing I need to get
done.
Thanks

#4 (**permalink**) 02 Feb 2004, 02:54 am

In article <20040201152858.13053.00001328@mb-m02.aol.com>,
ultrastryk@aol.com (ULTRASTRYK) wrote:

> >
> >Possibly a bad oxygen senor? What code are you getting?
> >
>
> Haven't had the codes pulled yet. I guess that is the first thing I need to
> get
> done.
> Thanks

Yes, get the ECU codes or go on a test drive. The ECU raises the idle
speed to whatever keeps the engine running smoothly. The fast idle
throbbing could anything from a leaky injector to a cracked engine block.

#5 (**permalink**) 05 Feb 2004, 08:42 pm

It's a bad IAC (Idle Air Control valve). It's mounted under the throttle
body. See this alot.

"ULTRASTRYK" <ultrastryk@aol.com> wrote in message
news:20040201071128.27200.00001350@mb-m11.aol.com...
> I am buying a 1999 Accord with the V6. The idle is oscilating between 1100
and
> 1900 rpms at an idle after it warms up. The check engine light is also on.
Any
> ideas? How hard to fix? Cost? It is at an auction, so if I want the car I
have
> to fix it myself.
> Thanks
> Bill
> Ultrastryk@aol.com

#6 (**permalink**) 06 Feb 2004, 08:40 pm

"DocWilly" <wetwillywill@hotmail.nospam.com> wrote in message news:<FrednVPnJ6eTbL_dRVn-hw@comcast.com>...
> It's a bad IAC (Idle Air Control valve). It's mounted under the throttle
> body. See this alot.
>
>

it'll be a p0505 iac fault. if it's low on coolant it'll do this. tap
the iac with a small hammer while it's running, most of the time it
will unstick and run for another year.
Chip

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