99 camry - strange idling behavior

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Old 26 Feb 2006, 09:08 pm   #1 (permalink)
onehappymadman@yahoo.com
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Default 99 camry - strange idling behavior

Finally got a new used car (found it from carsdirect.com; bought it
from a dealership). Will have the engine thoroughly inspected by a
mechanic tomorrow.

When the engine is cold, it revs up to 2000 rpm, then falls down to say
1300 rpm, then 10 seconds later, revs up to a little less than 2000 rpm
(1800 rpm, say) then falls down to a little less than 1300 rpm (1200
rpm, say). Kept doing this until the "low" rpm reading was about 1000
rpm, but only kept the engine on for about a minute - we were waiting
for a friend. (The heater was on full blast, by the way.)

Is this normal? I never noticed this on my '96 camry, or on my
parents' 2001 camry.

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Old 27 Feb 2006, 09:30 am   #2 (permalink)
learnfpga@gmail.com
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Default Re: 99 camry - strange idling behavior

same thing happenes to me too. but i have noticed that if the engine is
warm and then you turn on the car it stay below 1000rpm and doesnt rev
up like it does when turned on cold. i dont know why it happens but
would love to know if someone has an explaination.
by the way i also have 99 camry.

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Old 28 Feb 2006, 11:37 pm   #3 (permalink)
johngdole@hotmail.com
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Default Re: 99 camry - strange idling behavior

No. It's not normal for any car. Did you ever get this problem solved?
Or did it resolve itself through normal idle learning? It may be a
sticky idle air control (IAC) valve if it's still doing this. Do a
search on how to clean the IAC.


onehappymadman@yahoo.com wrote:
> Finally got a new used car (found it from carsdirect.com; bought it
> from a dealership). Will have the engine thoroughly inspected by a
> mechanic tomorrow.
>
> When the engine is cold, it revs up to 2000 rpm, then falls down to say
> 1300 rpm, then 10 seconds later, revs up to a little less than 2000 rpm
> (1800 rpm, say) then falls down to a little less than 1300 rpm (1200
> rpm, say). Kept doing this until the "low" rpm reading was about 1000
> rpm, but only kept the engine on for about a minute - we were waiting
> for a friend. (The heater was on full blast, by the way.)
>
> Is this normal? I never noticed this on my '96 camry, or on my
> parents' 2001 camry.


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Old 01 Mar 2006, 12:59 am   #4 (permalink)
onehappymadman@yahoo.com
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Default Re: 99 camry - strange idling behavior


johngdole@hotmail.com wrote:
> No. It's not normal for any car. Did you ever get this problem solved?
> Or did it resolve itself through normal idle learning? It may be a
> sticky idle air control (IAC) valve if it's still doing this. Do a
> search on how to clean the IAC.
>


Ok, I removed the air intake hose leading to the throttle body, turned
on the engine, squirted about 4 squirts of Toyota throttle body cleaner
into the IAC intake hole on the throttle body, then about 4 more
squirts of teflon into the same little hole.

Also cleaned the throttle plate (with the engine off) with a toothbrush
while I was there.

I didn't de-activate or short out any electronics before doing this.
Was this a bad idea?

Shut off the engine, put back the hose, and I noticed that the fans
still turned on every 30 seconds or so. (The engine was still warm
from a trip around town, prior to my cleaning the IAC.) Is this bad?

Mike

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Old 01 Mar 2006, 03:44 pm   #5 (permalink)
onehappymadman@yahoo.com
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Default Re: 99 camry - strange idling behavior

I think it's resolved... whether through normal idle learning or
through my use of solvents. At least it doesn't go up and down
anymore.

But, my cold idle RPMs are about 1800. Is this normal? My '96 camry
has a cold idle of about 1200 rpm.


johngdole@hotmail.com wrote:
> No. It's not normal for any car. Did you ever get this problem solved?
> Or did it resolve itself through normal idle learning? It may be a
> sticky idle air control (IAC) valve if it's still doing this. Do a
> search on how to clean the IAC.
>
>
> onehappymadman@yahoo.com wrote:
> > Finally got a new used car (found it from carsdirect.com; bought it
> > from a dealership). Will have the engine thoroughly inspected by a
> > mechanic tomorrow.
> >
> > When the engine is cold, it revs up to 2000 rpm, then falls down to say
> > 1300 rpm, then 10 seconds later, revs up to a little less than 2000 rpm
> > (1800 rpm, say) then falls down to a little less than 1300 rpm (1200
> > rpm, say). Kept doing this until the "low" rpm reading was about 1000
> > rpm, but only kept the engine on for about a minute - we were waiting
> > for a friend. (The heater was on full blast, by the way.)
> >
> > Is this normal? I never noticed this on my '96 camry, or on my
> > parents' 2001 camry.


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Old 01 Mar 2006, 07:51 pm   #6 (permalink)
johngdole@hotmail.com
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Default Re: 99 camry - strange idling behavior

Ok, then that does it. however, in the cleaning process it's very easy
to clog the EGR ports in the throttle body. This may be a possible
cause of the high NOx you are experiencing.

The ports should pull full engine vacuum when throttle plate is opened
past them. Again, a free loaner of MityVac from Autozone can help here.

onehappymadman@yahoo.com wrote:
> Ok, I removed the air intake hose leading to the throttle body, turned
> on the engine, squirted about 4 squirts of Toyota throttle body cleaner
> into the IAC intake hole on the throttle body, then about 4 more
> squirts of teflon into the same little hole.
>
> Also cleaned the throttle plate (with the engine off) with a toothbrush
> while I was there.
>
> I didn't de-activate or short out any electronics before doing this.
> Was this a bad idea?
>
> Shut off the engine, put back the hose, and I noticed that the fans
> still turned on every 30 seconds or so. (The engine was still warm
> from a trip around town, prior to my cleaning the IAC.) Is this bad?
>
> Mike


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Old 02 Mar 2006, 09:42 am   #7 (permalink)
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Default Re: 99 camry - strange idling behavior

If you just purchased the car at a Dealership, I'm uncertain why you would
be messing with repairs at this point. Usually there's some kind of
guarantee on the vehicle. In alot of cases, they purchase these cars from
auction and the quality control inspector on driveability is YOU. Return it
to them and let them change out the IAC, it's a $400 repair, get a new one
under warranty (if you can).
<onehappymadman@yahoo.com> wrote in message
news:1141196385.487701.210470@t39g2000cwt.googlegr oups.com...
>
> johngdole@hotmail.com wrote:
>> No. It's not normal for any car. Did you ever get this problem solved?
>> Or did it resolve itself through normal idle learning? It may be a
>> sticky idle air control (IAC) valve if it's still doing this. Do a
>> search on how to clean the IAC.
>>

>
> Ok, I removed the air intake hose leading to the throttle body, turned
> on the engine, squirted about 4 squirts of Toyota throttle body cleaner
> into the IAC intake hole on the throttle body, then about 4 more
> squirts of teflon into the same little hole.
>
> Also cleaned the throttle plate (with the engine off) with a toothbrush
> while I was there.
>
> I didn't de-activate or short out any electronics before doing this.
> Was this a bad idea?
>
> Shut off the engine, put back the hose, and I noticed that the fans
> still turned on every 30 seconds or so. (The engine was still warm
> from a trip around town, prior to my cleaning the IAC.) Is this bad?
>
> Mike
>



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Old 02 Mar 2006, 10:20 am   #8 (permalink)
onehappymadman@yahoo.com
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Default Re: 99 camry - strange idling behavior

psommerhalder@sbcglobal.net wrote:
> If you just purchased the car at a Dealership, I'm uncertain why you would
> be messing with repairs at this point. Usually there's some kind of
> guarantee on the vehicle. In alot of cases, they purchase these cars from
> auction and the quality control inspector on driveability is YOU. Return it
> to them and let them change out the IAC, it's a $400 repair, get a new one
> under warranty (if you can).


Why... I purchased it used from a dealership, "As-Is", and I didn't opt
for the extended warranty (it was about $1,600 for 12 months).

Car seems to work fine now. Just has a high idle, ~1800 rpm, but I
guess that's ok. Per Daniel's great information on how to clean the
IAC, all seems fine now.

Madman Mike

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Old 02 Mar 2006, 10:37 am   #9 (permalink)
onehappymadman@yahoo.com
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Default Re: 99 camry - strange idling behavior


onehappymadman@yahoo.com wrote:
> psommerhalder@sbcglobal.net wrote:
> > If you just purchased the car at a Dealership, I'm uncertain why you would
> > be messing with repairs at this point. Usually there's some kind of
> > guarantee on the vehicle. In alot of cases, they purchase these cars from
> > auction and the quality control inspector on driveability is YOU. Return it
> > to them and let them change out the IAC, it's a $400 repair, get a new one
> > under warranty (if you can).

>
> Why... I purchased it used from a dealership, "As-Is", and I didn't opt
> for the extended warranty (it was about $1,600 for 12 months).
>
> Car seems to work fine now. Just has a high idle, ~1800 rpm, but I
> guess that's ok. Per Daniel's great information on how to clean the
> IAC, all seems fine now.
>



That reminds me...

Schwarzenegger Signs Used Car Buyer Bill of Rights

http://www.consumeraffairs.com/news0..._used_car.html

California Governor Arnold Schwarzenegger has signed a bill giving used
car buyers new rights and protections. The California "Car Buyers Bill
of Rights" allows buyers a two-day cooling off period to return a used
vehicle.

The law also allows dealers to charge a fee for the return option. The
cancellation option can cost as much as $250 but permits a buyer to
return a used vehicle priced at less than $40,000 to a dealership
within two days of the sale, for any reason.

Doesn't take effect until July 1, 2006 though.

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Old 02 Mar 2006, 04:36 pm   #10 (permalink)
davidj92
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Default Re: 99 camry - strange idling behavior

onehappymadman@yahoo.com wrote:
snip
> That reminds me...
>
> Schwarzenegger Signs Used Car Buyer Bill of Rights
>
> http://www.consumeraffairs.com/news0..._used_car.html
>
> California Governor Arnold Schwarzenegger has signed a bill giving
> used car buyers new rights and protections. The California "Car
> Buyers Bill of Rights" allows buyers a two-day cooling off period to
> return a used vehicle.
>
> The law also allows dealers to charge a fee for the return option. The
> cancellation option can cost as much as $250 but permits a buyer to
> return a used vehicle priced at less than $40,000 to a dealership
> within two days of the sale, for any reason.
>
> Doesn't take effect until July 1, 2006 though.


In Indiana we have a 3-day period but, I always thought it was a federal law
that required a seller to give the buyer a 3-day cooling off period for a
major purchase. Maybe an auto doesn't qualify or maybe there's a dollar
amount in the federal law and our cooling off period is a state law.
davidj92


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