# failed etest 2x with too high NOx levels

**URL:** <https://forums.speedlife.net/t/failed-etest-2x-with-too-high-nox-levels/97845>\
**Category:** SON240sx Automotive\
**Created:** [July 11, 2006, 6:09pm UTC](https://forums.speedlife.net/t/failed-etest-2x-with-too-high-nox-levels/97845 "2006-07-11T18:09:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rmallari](https://avatars.discourse-cdn.com/v4/letter/r/898d66/32.png) [@rmallari](https://forums.speedlife.net/u/rmallari)\
**Post date:** [July 11, 2006, 6:09pm UTC](https://forums.speedlife.net/t/failed-etest-2x-with-too-high-nox-levels/97845/1 "2006-07-11T18:09:47Z")

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first off, my car is a 1990 240sx = SOHC KA24E .well today, i was looking under the hood and found a rubber hose was sorta ripped out. i think it is somewhat connected to the EGR valve and thought, maybe thats why my NO is high. i removed the hose and found that there was black powdery stuff in it…also the metal valve is filled with it. i tried taking some pics (used a phone cam…can’t find my other digicam). will post them up soon. so i would like to know if this is the actual problem why i am failing the etest. thanks.

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**Author:** ![rmallari](https://avatars.discourse-cdn.com/v4/letter/r/898d66/32.png) [@rmallari](https://forums.speedlife.net/u/rmallari)\
**Post date:** [July 11, 2006, 6:29pm UTC](https://forums.speedlife.net/t/failed-etest-2x-with-too-high-nox-levels/97845/2 "2006-07-11T18:29:40Z")

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![http://i110.photobucket.com/albums/n107/rmallari/whatsthis.jpg](http://i110.photobucket.com/albums/n107/rmallari/whatsthis.jpg)  
^^^what exactly is that part

![http://i110.photobucket.com/albums/n107/rmallari/11-07-06_2027.jpg](http://i110.photobucket.com/albums/n107/rmallari/11-07-06_2027.jpg)  
here is a picture of under that part

![http://i110.photobucket.com/albums/n107/rmallari/11-07-06_2029.jpg](http://i110.photobucket.com/albums/n107/rmallari/11-07-06_2029.jpg)  
here is the other piece of that hose

![http://i110.photobucket.com/albums/n107/rmallari/pic1.jpg](http://i110.photobucket.com/albums/n107/rmallari/pic1.jpg)  
and this is where it is connected too.  
that metal valve is filled with dark black powder just like that hose. any suggestions on cleaning it?

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**Author:** ![Zeta\_G](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zeta_g/32/5558_2.png) [@Zeta\_G](https://forums.speedlife.net/u/Zeta_G)\
**Post date:** [July 11, 2006, 8:50pm UTC](https://forums.speedlife.net/t/failed-etest-2x-with-too-high-nox-levels/97845/3 "2006-07-11T20:50:49Z")

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brake clearner or throttle body cleaner will work  
is just carbon build ups…