# s13 '89 finished a tranny swap, doesnt keep idle

**URL:** <https://forums.speedlife.net/t/s13-89-finished-a-tranny-swap-doesnt-keep-idle/90370>\
**Category:** SON240sx Automotive\
**Created:** [November 16, 2005, 5:36pm UTC](https://forums.speedlife.net/t/s13-89-finished-a-tranny-swap-doesnt-keep-idle/90370 "2005-11-16T17:36:44Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![zallow](https://avatars.discourse-cdn.com/v4/letter/z/49beb7/32.png) [@zallow](https://forums.speedlife.net/u/zallow)\
**Post date:** [November 16, 2005, 5:36pm UTC](https://forums.speedlife.net/t/s13-89-finished-a-tranny-swap-doesnt-keep-idle/90370/1 "2005-11-16T17:36:44Z")

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Hi guys!

As i said, i just finished a tranny swap (auto-\>manual) on my s13, but it doesnt keep idle. I hooked up the 3 gas lines back fine and that’s the only thing i touched on the engine when doing the swap. Anybody have any ideas what could cause that?

I’ve included a video for you to see what i’m talking about:

[http://www.zallow.com/240sx/240\_dies.avi](http://www.zallow.com/240sx/240_dies.avi)

Any comments welcome!  
Thanks!

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**Author:** ![Samco](https://avatars.discourse-cdn.com/v4/letter/s/e0b2c6/32.png) [@Samco](https://forums.speedlife.net/u/Samco)\
**Post date:** [November 17, 2005, 6:30am UTC](https://forums.speedlife.net/t/s13-89-finished-a-tranny-swap-doesnt-keep-idle/90370/2 "2005-11-17T06:30:59Z")

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check the setting on your idle stabilizer valve, if the adj. screw is all the way in turn it out a half turn

also try to keep it running with your foot and let it warm up, when its warm kill it and try again if it starts then I would be looking at a coolant temp sensor

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**Author:** ![Lith](https://avatars.discourse-cdn.com/v4/letter/l/fbc32d/32.png) [@Lith](https://forums.speedlife.net/u/Lith)\
**Post date:** [November 17, 2005, 8:14am UTC](https://forums.speedlife.net/t/s13-89-finished-a-tranny-swap-doesnt-keep-idle/90370/3 "2005-11-17T08:14:09Z")

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do you still have the Auto ECU?

I noticed that my car also dies when it’s cold w/ the auto ECU, but only when I first start it up. If I plug the 5spd. ECU, the car starts up and idles perfectly fine. The auto ECU is fine, but I have to keep my foot on the gas for a second or two so… after that, it’s fine.

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**Author:** ![zallow](https://avatars.discourse-cdn.com/v4/letter/z/49beb7/32.png) [@zallow](https://forums.speedlife.net/u/zallow)\
**Post date:** [November 17, 2005, 9:24am UTC](https://forums.speedlife.net/t/s13-89-finished-a-tranny-swap-doesnt-keep-idle/90370/4 "2005-11-17T09:24:43Z")

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i’ll try the idle screw thing, i knew about it, but it was late last night and didn’t have time to mess with it. I just thought maybe it was something more than just this, but you never know.

I tried to plug in the manual ECU tho and it still does it.

I’ll let you guys know, i have the whole afternoon to mess with this and it’s sunny. hehe 🙂