Rough Idle

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Old 08 Jun 2011, 08:19 pm   #1 (permalink)
Bob
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Default Rough Idle

After disconnecting the battery negative terminal for cleaning, I noticed
that the idle is a little rough. It seems to run ok, otherwise.

Anyone have an idea of what may have gone wrong? Is there a proper
proceedure for diconnecting the battery that I violated?

--
(You don't have a soul. You are a soul. You have a body)

C.S. Lewis

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Old 08 Jun 2011, 11:53 pm   #2 (permalink)
spsffan
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Default Re: Rough Idle

On 6/8/2011 6:19 PM, Bob wrote:
> After disconnecting the battery negative terminal for cleaning, I
> noticed that the idle is a little rough. It seems to run ok, otherwise.
>
> Anyone have an idea of what may have gone wrong? Is there a proper
> proceedure for diconnecting the battery that I violated?
>



Well, you don't specify what vintage or even type of car you are dealing
with. But, any car since about 1985 or so, in other words, with a
computer controlling the ignition, fuel system, etc. will do this.

When you disconnect the battery, you delete all the codes that the
computer has stored. The computers "learn" how each individual engine
works, and adapt. After a few cold starts, runs up to temperature and
back to cold cycles, it should get back to normal.

Disclaimer: You COULD have knocked something (vacuum hose?) loose while
poking around. The above assumes you did not.

Regards,

DAve
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Old 09 Jun 2011, 07:40 am   #3 (permalink)
Bob
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Default Re: Rough Idle

Dave,

Thanks for your help. As you advised, the situation seems to be improving on
my 2005 Camry LE 4 cylinder.

--
(You don't have a soul. You are a soul. You have a body)

C.S. Lewis

"spsffan" <spsffan@hotmail.com> wrote in message
news:ispjka0u09@news4.newsguy.com...
> On 6/8/2011 6:19 PM, Bob wrote:
>> After disconnecting the battery negative terminal for cleaning, I
>> noticed that the idle is a little rough. It seems to run ok, otherwise.
>>
>> Anyone have an idea of what may have gone wrong? Is there a proper
>> proceedure for diconnecting the battery that I violated?
>>

>
>
> Well, you don't specify what vintage or even type of car you are dealing
> with. But, any car since about 1985 or so, in other words, with a computer
> controlling the ignition, fuel system, etc. will do this.
>
> When you disconnect the battery, you delete all the codes that the
> computer has stored. The computers "learn" how each individual engine
> works, and adapt. After a few cold starts, runs up to temperature and back
> to cold cycles, it should get back to normal.
>
> Disclaimer: You COULD have knocked something (vacuum hose?) loose while
> poking around. The above assumes you did not.
>
> Regards,
>
> DAve


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