[Shotimes] Re: Idle Speed Controller Question

[Carl Prochilo]

Yes, IAB.  I was looking at Autozone website at the time.  Seems to have a
lot of different names.

My car seems to struggle now to hold a steady idle.  It has been
developing slowly over that past few months but not to the point of
stalling (yet).  At this point the idle will drop down to 600 momentarily
before it bops up, and the low oil pressure light will come on.  Part of
the problem was masked by the LPM since it bumps the idle up slightly, and
now I've removed the LPM from the PCM.

I was hoping cleaning the intake would cure the problem, but in fact I
neglected to clean the IAB while I had it off.  Is it just a matter of
pulling the part and spraying Berryman's in there?  I already know that
the lower screw is going to be a problem, so I may just pull the intake
off again to do it.
-- 
Cheers,
Carl Prochilo
92 Ultra Red Crimson

On Mon, January 17, 2005 10:21 am, Donald Mallinson said:
> Carl,
>
> You mean the Idle Air Bypass valve (IAB)?  I think that is
> what it usually is called.
>
> Symptoms are the car dies when you come to a stop and put in
> the clutch, especially after a highway run, like an exit
> ramp with a stop sign.
>
> ATX cars can develope a nasty rattling sound although the
> car will still idle, but not well.  Open the air cleaner and
> the rattle will be LOUD and that is usually the IAB.
>
> It can be cleaned with good results, certainly Performance
> Plus has been cleaning them on MTX cars since 1992 or so
> with good results.  Takes a few minutes, and if it doesn't
> work, then they replace it.
>
> I think the one on the ATX cars is different and usually it
> gets replaced.
>
> Don Mallinson
>
> Carl Prochilo wrote:
>> What are the symptoms of a failing ISC?
>>
>> Also, cleaning of the ISC is usually not considered to be effective, but
>> the part is cheap enough to just replace.  True?
>>
>> The ISC in question is from said 92 and is original (214K miles).
>> ====
>> Cheers,
>> Carl Prochilo
>> 1992 Ultra Red Crimson