# E-Tests \*ahem\*

**URL:** https://forums.speedlife.net/t/e-tests-ahem/106950
**Category:** SON240sx Automotive
**Created:** [May 28, 2007, 3:00pm UTC](https://forums.speedlife.net/t/e-tests-ahem/106950 "2007-05-28T15:00:57Z")
**Posts on this page:** 1
**Showing post:** 25

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### Author: ![boomheadshot](https://avatars.discourse-cdn.com/v4/letter/b/48db29/32.png) [@boomheadshot](https://forums.speedlife.net/u/boomheadshot)
#### Post date: [May 29, 2007, 8:50am UTC](https://forums.speedlife.net/t/e-tests-ahem/106950/25 "2007-05-29T08:50:54Z")

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> [@intresting find in the arctic :tup](https://forums.speedlife.net/t/intresting-find-in-the-arctic-tup/12770/9):
>
> I agree your timing might be off causing excessive hc and nox but that would be in the low hundreds not thousands… your egr is likely malfunctioning, which can lead to mild pre-ignition at light throttle or at the least retarded timing… which makes even more nox and makes your cruising fuel economy garbage

[COLOR=“Magenta”]  
Yeah, a friend of mine who works at Nissan stated something very similar…something about needing a new EGR valve?? (not sure if that makes sense) He also mentioned that the extra nox levels would in fact decrease my fuel economy which is no good since gas prices are sky high right now! :rolleyes: [/COLOR]

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