# Jeep rough idle when cold

**URL:** <https://community.cartalk.com/t/jeep-rough-idle-when-cold/5214>\
**Category:** Maintenance/Repairs\
**Tags:** cherokee, jeep\
**Created:** [September 28, 2007, 2:03pm UTC](https://community.cartalk.com/t/jeep-rough-idle-when-cold/5214 "2007-09-28T14:03:12Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Hal05](https://avatars.discourse-cdn.com/v4/letter/h/7feea3/32.png) [@Hal05](https://community.cartalk.com/u/Hal05)\
**Post date:** [September 28, 2007, 2:03pm UTC](https://community.cartalk.com/t/jeep-rough-idle-when-cold/5214/1 "2007-09-28T14:03:12Z")

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On my 1991 Jeep Cherokee, 6 cyl 4.0L engine, automatic, after it sits 4-5 hours (cold engine) starts, but has a tendency to stall unless you keep giving it gas.  
  
 The MAP sensor and the IAC idle control valve have been replaced recently. I am thinking it might be the TPS throttle position sensor since it is original and that’s 16 years old. The engine itself is a rebuilt with less than 15,000 miles on it.  
  
 Thanks Hal

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [September 28, 2007, 9:20pm UTC](https://community.cartalk.com/t/jeep-rough-idle-when-cold/5214/2 "2007-09-28T21:20:31Z")

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I’d be more inclined to suspect the temp sensor. The ECU may not know the engine is cold.

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**Author:** ![Hal05](https://avatars.discourse-cdn.com/v4/letter/h/7feea3/32.png) [@Hal05](https://community.cartalk.com/u/Hal05)\
**Post date:** [September 29, 2007, 3:09am UTC](https://community.cartalk.com/t/jeep-rough-idle-when-cold/5214/3 "2007-09-29T03:09:55Z")

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Hi,  
Can you be a little more descriptive on which temperature sensor? Would it be the  
Air Charge Temperature Sensor?  
Thanks  
Hal