Honda Car Forum

#1 (**permalink**) 28 Dec 2004, 09:19 pm

My 92 Prelude revs up and down at idle speed from 1000 to 2000rpm when
the temp is below 60 degrees. Does anyone know the cure for this
illness?

#2 (**permalink**) 29 Dec 2004, 12:27 pm

In my case, it was a bad O2. Others claimed insufficient coolant. Bleed
the coolant and then get back?

mjim@volcanomail.com wrote:

> My 92 Prelude revs up and down at idle speed from 1000 to 2000rpm when
> the temp is below 60 degrees. Does anyone know the cure for this
> illness?

#3 (**permalink**) 29 Dec 2004, 02:26 pm

mjim@volcanomail.com wrote:
> My 92 Prelude revs up and down at idle speed from 1000 to 2000rpm when
> the temp is below 60 degrees. Does anyone know the cure for this
> illness?
>

When your cooling system was last filled, was it bled of air?

#4 (**permalink**) 11 Jan 2005, 03:18 am

I have had the same problem with my 92 accord ex... in park and neutral it
will rev up and down... i've looked it up elsewhere and they said it could
be the idle air controller, which makes sense to me, and my mechanic
pointed the part out to me that is bad, and it's connected to the fuel
injector

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