1996 Civic engine knocking

1996 Civic DX Coupe 77K

I have noticed a knocking noise from the engine at 35-40 mph.

No loss of power or gas mileage, just a strange
"chugga-chugga-nok-nok-nok" at 35-40 mph. Its not very loud, but
notciable.

Any guesses? Clogged injectors?

Last major service was at 60K (rotor/distcap/plugs/wires..etc)

Any help appreciated.

Thank you all.

-Slim

Sounds like a timing problem, carbon deposits or cheap gas. Run a tank of
premium through it and see if the problem goes away. If it does then you
know you have pinging. The Brits call it "pinking".

Cheers,

Earle

"Slim" > wrote in message
...
>
> 1996 Civic DX Coupe 77K
>
> I have noticed a knocking noise from the engine at 35-40 mph.
>
> No loss of power or gas mileage, just a strange
> "chugga-chugga-nok-nok-nok" at 35-40 mph. Its not very loud, but
> notciable.
>
> Any guesses? Clogged injectors?
>
> Last major service was at 60K (rotor/distcap/plugs/wires..etc)
>
> Any help appreciated.
>
> Thank you all.
>
> -Slim
>

Slim wrote:
>
> 1996 Civic DX Coupe 77K
>
> I have noticed a knocking noise from the engine at 35-40 mph.
>
> No loss of power or gas mileage, just a strange
> "chugga-chugga-nok-nok-nok" at 35-40 mph. Its not very loud, but notciable.
>
> Any guesses? Clogged injectors?
>
> Last major service was at 60K (rotor/distcap/plugs/wires..etc)
>
> Any help appreciated.
>
> Thank you all.
>
> -Slim
>
------------------------------

See what the owner's manual says about how fast you can go before
shifting. Try splitting the difference and I expect your knocking will
go away. (interpretation: don't 'lug' it. Stay in lower gears until
you're at highway speed)

'Curly'

On 2007-05-04 21:27:44 -0400, motsco_ > said:

> Slim wrote:
>>
>> 1996 Civic DX Coupe 77K
>>
>> I have noticed a knocking noise from the engine at 35-40 mph.
>>
>> No loss of power or gas mileage, just a strange
>> "chugga-chugga-nok-nok-nok" at 35-40 mph. Its not very loud, but
>> notciable.
>>
>> Any guesses? Clogged injectors?
>>
>> Last major service was at 60K (rotor/distcap/plugs/wires..etc)
>>
>> Any help appreciated.
>>
>> Thank you all.
>>
>> -Slim
>>
> ------------------------------
>
> See what the owner's manual says about how fast you can go before
> shifting. Try splitting the difference and I expect your knocking will
> go away. (interpretation: don't 'lug' it. Stay in lower gears until
> you're at highway speed)

Thanks, but its an Auto.

The problem happens when I am coasting at 35-40 and hit the gas lightly.

I followed Earls advice and filled up with premium ($3.45 in NYC) and
drove it for three hours on the thruway...seems to be a lot less noise
now. I will go through a few tanks of premium in the hope this will
clear up.

Thanks again!

-Slim

On 2007-05-04 12:18:05 -0400, "Earle Horton" > said:

> Sounds like a timing problem, carbon deposits or cheap gas. Run a tank of
> premium through it and see if the problem goes away. If it does then you
> know you have pinging. The Brits call it "pinking".

Thanks! I ran for three hours on the thruway after filling up with
premium and it makes less of a noise now. I will run two more tanks of
premium though and see whay happens.

Thanks! ;-)

-Slim

"Slim" > wrote in message
...
> On 2007-05-04 12:18:05 -0400, "Earle Horton" > said:
>
> > Sounds like a timing problem, carbon deposits or cheap gas. Run a
> > tank of premium through it and see if the problem goes away. If it
> > does then you know you have pinging. The Brits call it "pinking".
>
> Thanks! I ran for three hours on the thruway after filling up with
> premium and it makes less of a noise now. I will run two more
> tanks of premium though and see whay happens.
>
> Thanks! ;-)
>
The premium won't fix it. I just suggested it for diagnostic purposes.
There is a timing problem or transmission problem involved here. Have an
experienced Honda mechanic look at it. Hopefully, you can convince them
that you want to take him along for a test drive. Then you can tell him
right when it happens.

Earle