1994 civic - engine revving itself in neutral

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hutchtoo - 30 Jun 2005 02:04 GMT

Hi all,

My prize 1994 Civic EX has a new problem, wonder if anyone knows what the
prob may be...

In park and neutral, the car revs every 3-4 seconds. i.e. it's a cycle that
repeats itself every 3-4 seconds where the engine revs up slightly, settles
back down, and repeats.

Otherwise, the car runs fine. Any ideas on what to look at?

Thanks.

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TeGGeR® - 30 Jun 2005 02:13 GMT

> Hi all,
>
[quoted text clipped - 8 lines]
>
> Thanks.

When did this start? What (if any) work was done on the motor prior to
onset?

How's the coolant level?

How old is the thermostat?

When were the cap/rotor/wires/plugs changed last?

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TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

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hutchtoo - 30 Jun 2005 02:37 GMT

TeGGeR, thanks for the reply.

> When did this start? What (if any) work was done on the motor prior to
> onset?

No work done beforehand other than an oil change, the revving started in the
winter, forgot about it, just started again. Happens on engine start, not on
a warm engine.

> How's the coolant level?

Fine.

> How old is the thermostat?

I don't remember replacing it, so probably 12 years. :)

> When were the cap/rotor/wires/plugs changed last?

I don't get tune ups often, so at least a couple years.

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Michael Pardee - 30 Jun 2005 06:39 GMT

>> How's the coolant level?
>
[quoted text clipped - 3 lines]
>
> I don't remember replacing it, so probably 12 years. :)

It sounds like a replacement thermostat and bleed of the coolant system
after that would be a good investment. The coolant level in the radiator can
be right to the top but enough air can be trapped to cause your symptoms.

Mike

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