# Prob a common Idle prob

**URL:** <https://forums.speedlife.net/t/prob-a-common-idle-prob/110498>\
**Category:** SON240sx Automotive\
**Created:** [October 24, 2007, 5:44pm UTC](https://forums.speedlife.net/t/prob-a-common-idle-prob/110498 "2007-10-24T17:44:15Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Neggy](https://avatars.discourse-cdn.com/v4/letter/n/f475e1/32.png) [@Neggy](https://forums.speedlife.net/u/Neggy)\
**Post date:** [October 24, 2007, 5:44pm UTC](https://forums.speedlife.net/t/prob-a-common-idle-prob/110498/1 "2007-10-24T17:44:15Z")

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On my Freinds 1989 240sx 5 speed, when he starts and runs the car its idles at around 1,800 rpm. I have reset the TPS to .50 volts and took off the EGR plate and AISC connected to it and cleaned it out. but the car is still idling High.

More detail. When the car is first started up it idles fine for 2-3 seconds then teh idle starts creeping up to the 1,800 rpm. what else could be the problem?

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**Author:** ![Neggy](https://avatars.discourse-cdn.com/v4/letter/n/f475e1/32.png) [@Neggy](https://forums.speedlife.net/u/Neggy)\
**Post date:** [October 25, 2007, 9:35am UTC](https://forums.speedlife.net/t/prob-a-common-idle-prob/110498/2 "2007-10-25T09:35:18Z")

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no one has any idea’s?

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**Author:** ![purposebuilt](https://avatars.discourse-cdn.com/v4/letter/p/90ced4/32.png) [@purposebuilt](https://forums.speedlife.net/u/purposebuilt)\
**Post date:** [October 25, 2007, 10:48am UTC](https://forums.speedlife.net/t/prob-a-common-idle-prob/110498/3 "2007-10-25T10:48:18Z")

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vacuum leak…check the injectors to see if they are snug…  
loose ground…

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**Author:** ![Cal](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/cal/32/5505_2.png) [@Cal](https://forums.speedlife.net/u/Cal)\
**Post date:** [October 25, 2007, 11:42am UTC](https://forums.speedlife.net/t/prob-a-common-idle-prob/110498/4 "2007-10-25T11:42:08Z")

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Idle Control?

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**Author:** ![Neggy](https://avatars.discourse-cdn.com/v4/letter/n/f475e1/32.png) [@Neggy](https://forums.speedlife.net/u/Neggy)\
**Post date:** [October 25, 2007, 2:09pm UTC](https://forums.speedlife.net/t/prob-a-common-idle-prob/110498/5 "2007-10-25T14:09:45Z")

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I also removed the fuel rail and reseated it when I did the EGR plate. I guess I will have to start tracken down vacume lines ☹ which I am not going to be able to find haha

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**Author:** ![DarkForceJackal](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)\
**Post date:** [October 26, 2007, 1:22am UTC](https://forums.speedlife.net/t/prob-a-common-idle-prob/110498/6 "2007-10-26T01:22:29Z")

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You could try:

– Cleaning out the IACV with TB cleaner to see if the valve is sticking/dirty  
– Ensuring your throttle cable isn’t stuck on anything/sticking or over-tightened & checking to make sure throttle plate closes off throttle  
– Ensuring spark plug connections are clean and wires are well-seated  
– Seeing if any codes on ECU

Might also be a coolant temperature sensor starting to go. They can cause anything from weird idle issues to a no-start, and don’t necessarily throw a code.