Hello,

I'm hoping somebody can help shed some light on this problem. My
vehicle only does this as the weather gets cold. Throughout the summer
I don't have the problem. It only returns in cold weather.

When I first start my vehicle the engine will idle normal for a minute
or so then it will go into rev up then drop off then rev up loop over
and over. I found if I put the vehicle into gear the strange idle
stops. Also if left longs enough without putting it into gear for 10
or 15 minutes I believe it will correct itself and stop reving up and
down. However I've only witnessed this once as I generally don't wait
around long enough for it to stop. Like I said as soon as I drive it
goes away. By the time I get to where I'm going it will sit and idle
just fine?

Thank you for your time. Any responses will be greatly appreciated.

Thank you, Jeff

 

"thecricket" <kunnathj@gmail.com> wrote in message news:1133362398.255038.49880@o13g2000cwo.googlegro ups.com...

> I'm hoping somebody can help shed some light on this problem. My
> vehicle only does this as the weather gets cold. Throughout the summer
> I don't have the problem. It only returns in cold weather.
> When I first start my vehicle the engine will idle normal for a minute
> or so then it will go into rev up then drop off then rev up loop over
> and over. I found if I put the vehicle into gear the strange idle
> stops. Also if left longs enough without putting it into gear for 10
> or 15 minutes I believe it will correct itself and stop reving up and
> down. However I've only witnessed this once as I generally don't wait
> around long enough for it to stop. Like I said as soon as I drive it
> goes away. By the time I get to where I'm going it will sit and idle
> just fine?

If you can identify the bleed screw, release the screw to force air out
once you fill coolant up to the filler neck on a warm motor with the heater
on Max. There are a couple sensor that can foul your 92 Accord cold idle.
The EACV is one of them.

 

"Burt S." wrote:
>
> "thecricket" <kunnathj@gmail.com> wrote in message news:1133362398.255038.49880@o13g2000cwo.googlegro ups.com...
>
> > I'm hoping somebody can help shed some light on this problem. My
> > vehicle only does this as the weather gets cold. Throughout the summer
> > I don't have the problem. It only returns in cold weather.
> > When I first start my vehicle the engine will idle normal for a minute
> > or so then it will go into rev up then drop off then rev up loop over
> > and over. I found if I put the vehicle into gear the strange idle
> > stops. Also if left longs enough without putting it into gear for 10
> > or 15 minutes I believe it will correct itself and stop reving up and
> > down. However I've only witnessed this once as I generally don't wait
> > around long enough for it to stop. Like I said as soon as I drive it
> > goes away. By the time I get to where I'm going it will sit and idle
> > just fine?
>
> If you can identify the bleed screw, release the screw to force air out
> once you fill coolant up to the filler neck on a warm motor with the heater
> on Max. There are a couple sensor that can foul your 92 Accord cold idle.
> The EACV is one of them.


-----------------------------

Cool, Psychic diagnosis. It does exist!! OP didn't mention the make,
year, or model, did they?

'Curly'

 

I'm sorry. The vehicle is a 91 Honda Accord EX.
I didn't quite understand the 2nd posting can anyone give some more
detail?

Thank you, Jeff

 

"thecricket" <kunnathj@gmail.com> wrote in message
news:1133381898.881985.93870@g49g2000cwa.googlegro ups.com...
> I'm sorry. The vehicle is a 91 Honda Accord EX.
> I didn't quite understand the 2nd posting can anyone give some more
> detail?
>
> Thank you, Jeff
>
The suggestion is that you have an airlock in the cooling system that is
confusing the car's sensors and the EAVC. He/she suggests you bleed the
system to remove the trapped air.

 

"Keyser Soze" <faradayincSPAM@hotmail.com> wrote in message news:X2ojf.765$OO6.47@news01.roc.ny...
> "thecricket" <kunnathj@gmail.com> wrote in message
> news:1133381898.881985.93870@g49g2000cwa.googlegro ups.com...

> > I'm sorry. The vehicle is a 91 Honda Accord EX.
> > I didn't quite understand the 2nd posting can anyone give some more
> > detail?

> The suggestion is that you have an airlock in the cooling system that is
> confusing the car's sensors and the EAVC. He/she suggests you bleed the
> system to remove the trapped air.

Bleeding is important. I'd set up a page just for bleeding. Check it out here.

http://square.cjb.cc/c/?HowToBleedCoolants

I'd kinda knew the OP has a 91or 92 from his history. Anyway, most of the
fluctuating RPM tends to happen to fuel injected Hondas.