1999 9-3 strange problem

Hi All,

I have a 1999 Saab 9-3 Convertible with about 90,000 miles on it.
The car starts and runs well. However, sometimes when the car idles
(regardless of transmission state), the engine goes to near stall
condition and then idles high for about 2 seconds and then goes back to
normal. Sometimes it happens multiple times within about a minute.

This is what I have done so far,

1) Checked all the hoses for leak but wasn't able to find any.
2) Replaced the fuel filter.
3) Replaced both Oxygen Sensor.
4) Replaced AIR filter.
5) Replaced spark plugs.
6) Cleaned the AIC
7) Cleaned the throttle body.

So far none of the above did anything.

I love the car however for past 2 months I am having problem with the
car. Any advice to what to look for will be appreciated.

Hi,
Check your cooling fan.
When it kicks in the motor rpm drops for a few seconds and then comes back
up.
My 02 does that as well and is nothing to be worried about.

Warren
"aa" <aahsan DeleteThis @gmail.com> wrote in message
news:1167369143.738388.66190@73g2000cwn.googlegroups.com...
> Hi All,
>
> I have a 1999 Saab 9-3 Convertible with about 90,000 miles on it.
> The car starts and runs well. However, sometimes when the car idles
> (regardless of transmission state), the engine goes to near stall
> condition and then idles high for about 2 seconds and then goes back to
> normal. Sometimes it happens multiple times within about a minute.
>
> This is what I have done so far,
>
> 1) Checked all the hoses for leak but wasn't able to find any.
> 2) Replaced the fuel filter.
> 3) Replaced both Oxygen Sensor.
> 4) Replaced AIR filter.
> 5) Replaced spark plugs.
> 6) Cleaned the AIC
> 7) Cleaned the throttle body.
>
> So far none of the above did anything.
>
> I love the car however for past 2 months I am having problem with the
> car. Any advice to what to look for will be appreciated.
>