# e-test **URL:** \ **Category:** SON240sx Automotive\ **Created:** [August 29, 2007, 4:14pm UTC](https://forums.speedlife.net/t/e-test/109009 "2007-08-29T16:14:46Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![fastback240](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fastback240/32/5591_2.png) [@fastback240](https://forums.speedlife.net/u/fastback240)\ **Post date:** [August 29, 2007, 6:03pm UTC](https://forums.speedlife.net/t/e-test/109009/5 "2007-08-29T18:03:17Z")
> [@6/25 ECCN Autox](https://forums.speedlife.net/t/6-25-eccn-autox/13497/56): > > did you bleed out all the air from the system??? Combustion chamber temperatures usually dictate nox level. so higher combustion temps equal higher nox level, and lower combustion temps equal lower nox. are you sure you got the right spark plugs? try one heat range higher… i think. I think that higher temp range plugs run colder combustion temps?? might have to check that one out. god sombody just get me a fake one ☹ iv done so much to this car i just want it to be over lol --- _[View the full topic](https://forums.speedlife.net/t/e-test/109009)._