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From: Richard on 19 Apr 2008 10:30
I would like to ask for a 91 corolla A/C idle up valve (ACIV)
Assuming A/C is switched on and set to the coolest position.
During warm up there isn't problem (If I remove the connector to the ACIV
the engine will run very slow and almost die off due to the A/C load)
After the engine has warmed up for some time, even when I remove the
connection to the ACIV, the engine remains the same speed. If I turn the
throttle a bit I can hear a click sound coming from the ACIV. I believe that
the ACIV is on once I run the engine slighty faster eg 1300 rpm.

Is it normal that the ACIV doesn't switch on whenever the compressor clutch
is latched?

I have this problem because I've a problem with the A/C idling speed which
is about 900rpm (after warm up) and I believe is not fast enough. Definately
I can just adjust the screw at the throttle but this would shift the idle
speed when the A/C is off as according to Hayes manual idle speed is 700 rpm
for manual

Appreciate any inputs. Thanks



Richard


From: Ray O on 19 Apr 2008 11:45

"Richard" <boxsterremove(a)myrealbox.com> wrote in message
news:fucpl9$fe$1(a)reader01.singnet.com.sg...
>I would like to ask for a 91 corolla A/C idle up valve (ACIV)
> Assuming A/C is switched on and set to the coolest position.
> During warm up there isn't problem (If I remove the connector to the ACIV
> the engine will run very slow and almost die off due to the A/C load)
> After the engine has warmed up for some time, even when I remove the
> connection to the ACIV, the engine remains the same speed. If I turn the
> throttle a bit I can hear a click sound coming from the ACIV. I believe
> that the ACIV is on once I run the engine slighty faster eg 1300 rpm.
>
> Is it normal that the ACIV doesn't switch on whenever the compressor
> clutch is latched?
>
> I have this problem because I've a problem with the A/C idling speed which
> is about 900rpm (after warm up) and I believe is not fast enough.
> Definately I can just adjust the screw at the throttle but this would
> shift the idle speed when the A/C is off as according to Hayes manual idle
> speed is 700 rpm for manual
>
> Appreciate any inputs. Thanks
>
>
>
> Richard

I do not have the idle up specifications handy, but the AC idle up to 900
RPM sounds about right to me. The idle up should only be in the
neighborhood of 200 RPM.
--

Ray O
(correct punctuation to reply)


From: larry moe 'n curly on 19 Apr 2008 22:36

Richard wrote:

> I would like to ask for a 91 corolla A/C idle up valve (ACIV)

> I have this problem because I've a problem with the A/C idling speed which
> is about 900rpm (after warm up) and I believe is not fast enough. Definately
> I can just adjust the screw at the throttle but this would shift the idle
> speed when the A/C is off as according to Hayes manual idle speed is 700 rpm
> for manual

My 1986 (carbureted) Corolla, with a smaller, weaker engine, is
supposed to idle at 750 RPM (automatic) with the A/C turned off, 900
RPM with the A/C running.

I've gotten lots of wrong fuel system information from Haynes and
Chilton books. Chilton gave the wrong procedure for adjusting my
Nissan's idle, while Haynes listed the wrong fuel system. That's why
I always check either a factory manual or a Mitchell (libraries).
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