I have a 92 RS and it pretty cold in the morning. I start it and it idles at 1500rpm, I give it about 5 minutes and the rpm's drop under 1000. Is itbetter to warm up the car like this or should i just take off after turning on the car?

 

All you are doing is wasting gas leting the car idle,it will go into the open loop mode if its parked or moving.

 

What is an open loop mode?
So its ok to just turn on the car and take off cuz i dont want to stress the engine.

Sorry Imsort of anewbie when it comes to cars

 

if ur car idles at 1500 rpms something is seriously wrong my stock rs idle beetween 500-700

 

Even if its at 1500rpm just on startup...?
It goes down to 600-800 range after warminng up.

 

No need to warm up modern fuel injected cars if you are using the recommended winter grade oil. Just give 30 seconds to get the oil circulating and drive gently till the engine is at normal temp. This will let the car warm up quicker and waste less gas than just letting it idle in the driveway. It is normal for the car to idle fast when first started and then to drop down to normal idle as it warms up. This is all controlled by the computer.

 

Righton man... thats all i needed to know. Thanks.

 

I've been having the exact same problem as you with letting the car warm up when its below freezing outside. When I start the car it idels about 1500 then after about 1 min it drops down under 1000, so just let it warm up and run or give it a little rev that seemed to always work.

 

Let it warm until the idle drops to 1000rpm then take off and drive easy until it warms a little more to circulate the tranny fluids.
If you have an automatic and you keep dropping it in gear while its at 1500 your gonna blow something up. I have seen many rear ends blown up because people dont have patients and they throw it in reverse to back out the drive way and BAM! Then all you hear is clank, clank, clunk

 

Open & Closed Loop modes are controled by the ECU on start up by taking readings from the O2 sensor. This resulte in more fuel at start up and higher engine RPMs. This is a simple explaination, do a search on www.thirdgen.org for more details.