Ok, here is my problem. This started about halfway through last winter. When it gets very cold out (maybe 20-25 degrees F), my car has trouble idling. It is fine when it starts, but between stop signs and lights, the idle drops way below what it is supposed to be and flucuates randomly. Sometimes it drops so low that the car stutters and stalls, at which point is very difficult to start again. It basically feels like the car is going to stall almost every time I let the car idle. Again, this only happens during very cold days. Sometimes it does not do it, and sometimes it does. Aside from the cold weather, it feels kind of random. This started sometime last winter. I had not made any changes to the car at the time. There is no CEL, or any other types of problems. Any ideas? I can tell you any information that you need, but I have no idea where to start.
Other things I noticed:
1. It only starts having problems when the car is at least partially warmed up. It does not happen for at least 10 minutes after the car starts.
2. If I let the car go(do not hit the gas), the car either levels out and runs fine until the next stop, or stalls.
3. The colder it is outside, the harder the car struggles. During the extreme cold, the car will almost always stall without assistance.

 

there is an air temperature sensor after your air filter that adjusts fuel air ratio for ambient air temp. This may cause problems if it's shot. Also you could try switching your oil to a lower viscosity one. Make sure you have radiator fluid in your coolant lines. Check your power steering and break fluid for water.



and put winter air in your tires tongue.gif

 

You know, some people actually believe that. We had a girl at my school ready to take her car in so they could put the winter air in her tires so it was safer
Sorry for the offtopic.gif

 

Lol, are you sure they didn't mean Nitrogen?

 

Check Your TPS, has is been changed from the OEM one?

 

mybe it's oxygen sensor?

offtopic.gif starting nitrogen in tires topic...

 

I have not changed the TPS or the upstream O2 sensor yet. I will go out this weekend and get some data. I have also had really bad gas mileage, but I did not think it was related because I had decent gas mileage last year. By the way, my car feels kind of sluggish to its former self. I will check all the above mentioned areas.

 

could be hand break impropperly adjusted.