ok so my wife just bought a 2005 neon. everything was fine for about a week. then the car started to stall out a stop lights. the problem only persisted only while it was hot outside. since the problem started it has been cold outside and we did not have a problem then. it also looks as if the coolant system is using more fluid then it should be. we have looked under the vehicle for leaks but could not find any. we did have to change the cam shaft position sensor. we changed it about a week ago. it fixed the problem for maybe a couple days but then the problem is started happening again. has anyone ran into this before and if so what did you do to fix it.

 

Coolant could be leaking more while in motion. Look for any accumulated wetness under the car. I'd also check for any vacuum leaks.

 

I also have the same problem with my 2005 neon...when i changed the cam sensor it was fine for awhile but the happened again, so i changed the idle air control valve and it ran great for bout a week again but now im getting a different code than before....P0344.....i have a book but i dont understand wut it means.. can anyone help....?????

P.S.,
i have also changed the crank sensor and had the same effect as when i changed the other sensors. We can drive it at night but not when it has been sitting in the sun all day.

 

If it's temp related, I would guess MAP sensor. Does the water temp raise/fluctuate, or is it steady (after getting up to temp)?

Did you get a code to know to change the CSPS or the IACV?

The engine shouldn't use any coolant, so if it is and you can't find a leak it might be within the engine. Do you have any water in the oil, or water vapor in the exhaust?

 

CEL on?