Honda Car Forum

#1 (**permalink**) 26 Jan 2007, 05:16 pm

i have a 93 honda prelude auto and when it is in park the revs go up and
down does anyone know why it would do this. it doesnt happen with
anything else.

#2 (**permalink**) 26 Jan 2007, 05:46 pm

could be fast idle valve, could be eacv, could be lack of coolant, and
could be your tranny...

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#3 (**permalink**) 26 Jan 2007, 05:56 pm

In article
<81e460134d4d17d5ae29b7109927a53e@localhost.talkab outautos.com>,
"pixielee" <pixielee21egypt@yahoo.co.uk> wrote:

> i have a 93 honda prelude auto and when it is in park the revs go up and
> down does anyone know why it would do this. it doesnt happen with
> anything else.

This happened on my 02 Odyssey; the idle air control valve went bad.

#4 (**permalink**) 26 Jan 2007, 09:21 pm

pixielee wrote:
> i have a 93 honda prelude auto and when it is in park the revs go up and
> down does anyone know why it would do this. it doesnt happen with
> anything else.
>
check coolant level inside radiator is full to the top and that all air
is purged from the system.

#5 (**permalink**) 27 Jan 2007, 08:25 pm

I had that happening to me on neutral during cold weather, I was told by a
trustable mechanic it was not a big deal and I never did anything about it,
still running great, although I didnT face extreme cold really lately.

"pixielee" <pixielee21egypt@yahoo.co.uk> wrote in message
news:81e460134d4d17d5ae29b7109927a53e@localhost.ta lkaboutautos.com...
>i have a 93 honda prelude auto and when it is in park the revs go up and
> down does anyone know why it would do this. it doesnt happen with
> anything else.
>

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