Is the idle speed of 89 V6 (3VZ-E) adjustable?

My Chilton manual says "The idle speed on the fuel injected engines
is electronically controlled by the Engine Control Module (ECM)
computer. The Idle Speed Control (ISC) system electronically oversees
the proper idle speed for all operating conditions. This is a good
news/bad news arrangement. The bad news is that you can't adjust it;
the good news is that it rarely, if ever, needs adjusting. Any
roughness or uneven idle is almost due to other causes such as a
clogged injector, air leak or loose, corroded terminals in the wiring
harness."

Whereas, the Haynes Repair Manual says "if the idle speed is
incorrect, remove the rubber plug (if equipped) and turn the idle speed
adjusting screw to change it."

Also, when Haynes is covering the Air Valve, it says "to check the
operation of the air valve on a V6, start the engine, then turn the
idle speed adjusting screw all the way in, while the engine is still
cold, rpm should drop; when the engine is warmed up, rpm should not
drop." How do I interpret this statement? On my V6, idle can be
easily adjusted from 500 to 1200rpm when engine is hot. Does that mean
the Air Valve is faulty?

On 19 Jun 2006 18:36:49 -0700, [email]mixedsig@gmail.com[/email] wrote:
[color=blue]
>My Chilton manual says "The idle speed on the fuel injected engines
>is electronically controlled by the Engine Control Module (ECM)
>computer. The Idle Speed Control (ISC) system electronically oversees
>the proper idle speed for all operating conditions. This is a good
>news/bad news arrangement. The bad news is that you can't adjust it;
>the good news is that it rarely, if ever, needs adjusting. Any
>roughness or uneven idle is almost due to other causes such as a
>clogged injector, air leak or loose, corroded terminals in the wiring
>harness."
>
>Whereas, the Haynes Repair Manual says "if the idle speed is
>incorrect, remove the rubber plug (if equipped) and turn the idle speed
>adjusting screw to change it."
>
>Also, when Haynes is covering the Air Valve, it says "to check the
>operation of the air valve on a V6, start the engine, then turn the
>idle speed adjusting screw all the way in, while the engine is still
>cold, rpm should drop; when the engine is warmed up, rpm should not
>drop." How do I interpret this statement? On my V6, idle can be
>easily adjusted from 500 to 1200rpm when engine is hot. Does that mean
>the Air Valve is faulty?[/color]


THere should be a plug near butterfly vlave tht you can remove and
access idle bleed.
-----------------
The SnoMan
[url]www.thesnoman.com[/url]

SnoMan wrote:[color=blue]
> On 19 Jun 2006 18:36:49 -0700, [email]mixedsig@gmail.com[/email] wrote:
>[color=green]
> >My Chilton manual says "The idle speed on the fuel injected engines
> >is electronically controlled by the Engine Control Module (ECM)
> >computer. The Idle Speed Control (ISC) system electronically oversees
> >the proper idle speed for all operating conditions. This is a good
> >news/bad news arrangement. The bad news is that you can't adjust it;
> >the good news is that it rarely, if ever, needs adjusting. Any
> >roughness or uneven idle is almost due to other causes such as a
> >clogged injector, air leak or loose, corroded terminals in the wiring
> >harness."
> >
> >Whereas, the Haynes Repair Manual says "if the idle speed is
> >incorrect, remove the rubber plug (if equipped) and turn the idle speed
> >adjusting screw to change it."
> >
> >Also, when Haynes is covering the Air Valve, it says "to check the
> >operation of the air valve on a V6, start the engine, then turn the
> >idle speed adjusting screw all the way in, while the engine is still
> >cold, rpm should drop; when the engine is warmed up, rpm should not
> >drop." How do I interpret this statement? On my V6, idle can be
> >easily adjusted from 500 to 1200rpm when engine is hot. Does that mean
> >the Air Valve is faulty?[/color]
>
>
> THere should be a plug near butterfly vlave tht you can remove and
> access idle bleed.
> -----------------
> The SnoMan
> [url]www.thesnoman.com[/url][/color]

Yeas, the smog guy showed me where this was on my 92 3VZE V6

"crashq" <crashq@pacbell.net> wrote in message
news:1152805553.360682.235700@35g2000cwc.googlegroups.com...[color=blue]
>
> SnoMan wrote:[color=green]
>> On 19 Jun 2006 18:36:49 -0700, [email]mixedsig@gmail.com[/email] wrote:
>>[color=darkred]
>> >My Chilton manual says "The idle speed on the fuel injected engines
>> >is electronically controlled by the Engine Control Module (ECM)
>> >computer. The Idle Speed Control (ISC) system electronically oversees
>> >the proper idle speed for all operating conditions. This is a good
>> >news/bad news arrangement. The bad news is that you can't adjust it;
>> >the good news is that it rarely, if ever, needs adjusting. Any
>> >roughness or uneven idle is almost due to other causes such as a
>> >clogged injector, air leak or loose, corroded terminals in the wiring
>> >harness."
>> >
>> >Whereas, the Haynes Repair Manual says "if the idle speed is
>> >incorrect, remove the rubber plug (if equipped) and turn the idle speed
>> >adjusting screw to change it."
>> >
>> >Also, when Haynes is covering the Air Valve, it says "to check the
>> >operation of the air valve on a V6, start the engine, then turn the
>> >idle speed adjusting screw all the way in, while the engine is still
>> >cold, rpm should drop; when the engine is warmed up, rpm should not
>> >drop." How do I interpret this statement? On my V6, idle can be
>> >easily adjusted from 500 to 1200rpm when engine is hot. Does that mean
>> >the Air Valve is faulty?[/color]
>>
>>
>> THere should be a plug near butterfly vlave tht you can remove and
>> access idle bleed.
>> -----------------
>> The SnoMan
>> [url]www.thesnoman.com[/url][/color]
>
> Yeas, the smog guy showed me where this was on my 92 3VZE V6[/color]

Where is it? I couldnt find it on mine. Well if its the screw ontop of the
throttle body mine dont work.