# My POS Altima

**URL:** <https://forums.speedlife.net/t/my-pos-altima/200335>\
**Category:** PittSpeed Automotive\
**Created:** [October 25, 2008, 5:50am UTC](https://forums.speedlife.net/t/my-pos-altima/200335 "2008-10-25T05:50:12Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![06se-r](https://avatars.discourse-cdn.com/v4/letter/0/c5a1d2/32.png) [@06se-r](https://forums.speedlife.net/u/06se-r)\
**Post date:** [October 26, 2008, 5:09pm UTC](https://forums.speedlife.net/t/my-pos-altima/200335/6 "2008-10-26T17:09:54Z")

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> [@Caught Police in action 2 pics](https://forums.speedlife.net/t/caught-police-in-action-2-pics/38448/17):
>
> So my 2000 Nissan altima is idling like shit, the engine is a KA24DE. The rpm’s bounce from 400rpm to 800 rpm, but it idles fine when fast idle is on or the air is on(because the idle is a little higher). I have replaced the 02 sensors, did a complete tune up, checked the egr, and checked for vacumn leaks. I get pissed and took it to a shop last week. They said cylinder #4 is not firing but it has spark, compression, and fuel. :nuts: They swapped injectors and swapped a distributer to try and resolve the issue, but it did not work. They also said the IAB is working as it should. The code it throws is a generic code for running lean, thanks Nissan, that really fucking helps. 🙂
> 
> Any ideas?

if its running lean, try putting an o2 spacer on the 1st o2 sensor. i used a spacer on mine to get rid of a cel, and it worked, but made my car run real rich, like my mpg dropped almost 3-4 mpg. i know its the best response, but it worked my nissan

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