'99 Camry Idle Control Valve

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Old 28 Nov 2005, 09:48 pm   #1 (permalink)
John Smith
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Default '99 Camry Idle Control Valve

My son has a '99 Camry that seems to go through an idle control valve(?)
at least once a year. At $200 for the valve + $200 for installation this
is not acceptable. I found a thread in an online forum where others have
had similar problems and Toyota blames the gas they are using.

Any thought on this issue in this group?

TIA, John

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Old 29 Nov 2005, 06:55 am   #2 (permalink)
m Ransley
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Default Re: '99 Camry Idle Control Valve

Mine is a 90 and never replaced, Is the part Toyota or aftermarket made
at Hoos in back of jacks in Hong Shoe Provence China by blind people.
Aftermarket is often junk. You have full warranty if its Toyota.

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Old 29 Nov 2005, 08:28 am   #3 (permalink)
Daniel
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Default Re: '99 Camry Idle Control Valve

My answer is part conjecture, and part speculation but seems to have
worked for me.
I used to clean the idle control valve ("IAC" - idle air control valve)
with carburetor cleaner, when people said better to replace with new
for more durable results.
Since it seemed to need cleaning more frequently, I replaced it and
followed all the procedures in the Factory Service manual for the
associated throttle body removal and cleaning.
Then the problem recurred!
I had deconstructed the old IAC valve just to see how it was put
together. IIRC, it had a bimetallic thermostatic coil on one end and an
electromagnetic coil on the other.
There is a cylindrical shaped piece of metal that rotates to open a
port, but this is metal to metal contact with no provision for
lubrication.
So I began using TriFlow spray lubricant with Teflon and it seems to
work quite well.
A small amount can be sprayed into the rectangular opening at the
bottom of the entrance to the throttle body which is the air inlet to
the valve.
I've tried spraying both cold and warm, depending on conditions.
Seems to work well for me.
I was not about to replace that valve again after having installed a
factory fresh one and having the problem recur.

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Old 01 Dec 2005, 04:42 pm   #4 (permalink)
davidj92
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Default Re: '99 Camry Idle Control Valve

Daniel wrote:
snip
> So I began using TriFlow spray lubricant with Teflon and it seems to
> work quite well.

snip

I used to use that lube on motorcycle chains. Several friends used PJ's and
my chains used to always last a while longer than theirs.
davidj92


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Old 10 Jan 2006, 09:35 pm   #5 (permalink)
noodlerooney
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Default Re: Re: '99 Camry Idle Control Valve

"" wrote:
> My answer is part conjecture, and part speculation but seems
> to have
> worked for me.
> I used to clean the idle control valve ("IAC" - idle air
> control valve)
> with carburetor cleaner, when people said better to replace
> with new
> for more durable results.
> Since it seemed to need cleaning more frequently, I replaced
> it and
> followed all the procedures in the Factory Service manual for
> the
> associated throttle body removal and cleaning.
> Then the problem recurred!
> I had deconstructed the old IAC valve just to see how it was
> put
> together. IIRC, it had a bimetallic thermostatic coil on one
> end and an
> electromagnetic coil on the other.
> There is a cylindrical shaped piece of metal that rotates to
> open a
> port, but this is metal to metal contact with no provision for
> lubrication.
> So I began using TriFlow spray lubricant with Teflon and it
> seems to
> work quite well.
> A small amount can be sprayed into the rectangular opening at
> the
> bottom of the entrance to the throttle body which is the air
> inlet to
> the valve.
> I've tried spraying both cold and warm, depending on
> conditions.
> Seems to work well for me.
> I was not about to replace that valve again after having
> installed a
> factory fresh one and having the problem recur.


nospampls20021:
94 Camry 5SFE, A140E: Thanks for the lubrication tip. I repeatedly
cleaned out my IAC for lack of a cold idle and it did not fix the
problem. Using the Factory Service Manual, tried every test and
tested OK. Sprayed a very little (1/2 second) silicon spray into IAC
port, cycled IAC manually open and closed while also giving time for
the spray carrier to evaporate. Fixed my cold idle problem, nice 1350
RPM cold idle. Thanks, this was driving me crazy.

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