97. Idles for 15 minutes at start. Then reduces to normality. It the common to take 15 minutes to reduce the start up idle.?
Thanks

 

Hello,

There were plenty of threads on that topic before, here is the one with a few links. In short, it is normal for those cars to stay at 1500 RPM for a while, the exact time depends on the conditions the car is in, in the summer it can be as low as 4-5 minutes the last time I checked.

Hope this helps and best of luck!

 

Thx. All the forum suggests is clean the throttle body. Might try it. Not so sure that’s a good solution as it will idle correctly after a 15 minute warm up.

 

The throttle body itself is closed at idle, the car uses Idle Air Control (IAC) Valve to adjust the engine speed at idle. While it will not hurt to check and clean the throttle body, you will also need to clean out IAC valve as well, here is how to do so.

Hope this helps and best of luck!

 

Thanks a lot.

 

After researching the IOC valve issue. The few I’ve read had issues of rough or low idle speed. Mine is high idle. About 1500 for ten minutes then it decreases. I’m thinking it doing what it’s suppose to. Just slam the transmission a little at first when putting into gear.

 

It actually doesn't really matter which way for the valve to get stuck, it's just that it is not opened all the way most of the time, so it usually gets stuck at lower RPM. With that, as I wrote before, it is what they all do after a startup, and there is not a whole lot you can do about it, just like with the fact that it won't engage 3rd gear before it warms up a bit, more likely than not, it has something to do with the ecology..

As for putting the car in gear, after some trials I learned that if you put it in gear right after startup, it is much easier on the car, meaning that you get quite a bit less of a jolt each time. Why that is, I have no idea..

Hope this helps and best of luck!