I own a 99 honda accord. I don't have problem with for almost 6 years.
Today, when I started engine in parking position, I heard some strange
noise, sounds like sudden accelerations, tachometer goes from 1000rmp
to 2000rmp than drops back to 1000rmp, going back and forward. I
thought something wrong with gas pedal. Then I drived it around, the
engin noise grow louder.

Does this indicate a big problem with the engine?

Thanks,

-James

 

dexue wrote:
> I own a 99 honda accord. I don't have problem with for almost 6 years.
> Today, when I started engine in parking position, I heard some strange
> noise, sounds like sudden accelerations, tachometer goes from 1000rmp
> to 2000rmp than drops back to 1000rmp, going back and forward. I
> thought something wrong with gas pedal. Then I drived it around, the
> engin noise grow louder.
>
> Does this indicate a big problem with the engine?
>
> Thanks,
>
> -James


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

Check the oil level, see if the rad is full, and the reservoir should be
full to the line. Check back if anything isn't where it should be.

'Curly'

 

I agree check all the fluids levels first.
I would also check airflow sensor which should be somewhere by the air
filter and idle control sensor I am guessing by the air intake
manifold.
I can't really give you good locations but I am sure you can find it
fairly easy if you look up in manual.
I own Honda now but my previous car had rough idle and rpm fluctuation,
cleaning (very careful) airflow sensor with of "windex" and idle
control sensor with contact cleaner solved the problem (all lot of
carbon buildup).

Good luck, hpe it helped

 

Are you driving a modified honda?

 

Are you driving a modified honda?

 

No, it is not modified honda.

 

Thanks all of you, I followed your recommend. I found the problem and
fixed it. It was the tube connecting the reservoir to the radiator
loosing up, prevent coolant circulation.
Now The engine runs smoothly again. :-)

Thanks again,

-James