# E-test question

**URL:** <https://forums.speedlife.net/t/e-test-question/84465>\
**Category:** SON240sx Automotive\
**Created:** [March 23, 2005, 8:24am UTC](https://forums.speedlife.net/t/e-test-question/84465 "2005-03-23T08:24:14Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![mpc2323](https://avatars.discourse-cdn.com/v4/letter/m/977dab/32.png) [@mpc2323](https://forums.speedlife.net/u/mpc2323)\
**Post date:** [March 23, 2005, 8:24am UTC](https://forums.speedlife.net/t/e-test-question/84465/1 "2005-03-23T08:24:14Z")

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My car failed the NO ppm test. What do I to fix it?

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**Author:** ![s13\_2bar](https://avatars.discourse-cdn.com/v4/letter/s/edb3f5/32.png) [@s13\_2bar](https://forums.speedlife.net/u/s13_2bar)\
**Post date:** [March 23, 2005, 7:35pm UTC](https://forums.speedlife.net/t/e-test-question/84465/2 "2005-03-23T19:35:26Z")

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It would help … if you could tell us all the reading and the limits. Also if the vehicle failed at idle, or under load.

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**Author:** ![S13GG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/s13gg/32/5506_2.png) [@S13GG](https://forums.speedlife.net/u/S13GG)\
**Post date:** [March 23, 2005, 9:54pm UTC](https://forums.speedlife.net/t/e-test-question/84465/3 "2005-03-23T21:54:09Z")

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put a REALLY large and short exhuast tip on it :twisted:

and when they tell you they’re having trouble testing it, tell them to “go suck a lemon”

lossen the cat from the DP a little? some poisonous exh. will escape before the testing device can find them

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<div class="post-metadata">

**Author:** ![mpc2323](https://avatars.discourse-cdn.com/v4/letter/m/977dab/32.png) [@mpc2323](https://forums.speedlife.net/u/mpc2323)\
**Post date:** [March 24, 2005, 10:54am UTC](https://forums.speedlife.net/t/e-test-question/84465/4 "2005-03-24T10:54:53Z")

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hc ppm = 9(running25mph), 8 idling  
CO = 0.02---------------, 0.01 idle  
HO =875----------750 is the limit

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**Author:** ![s13\_2bar](https://avatars.discourse-cdn.com/v4/letter/s/edb3f5/32.png) [@s13\_2bar](https://forums.speedlife.net/u/s13_2bar)\
**Post date:** [March 24, 2005, 11:44am UTC](https://forums.speedlife.net/t/e-test-question/84465/5 "2005-03-24T11:44:47Z")

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With the little info given … it looks like you need a cat.

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**Author:** ![nocwage](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nocwage/32/5489_2.png) [@nocwage](https://forums.speedlife.net/u/nocwage)\
**Post date:** [March 24, 2005, 12:08pm UTC](https://forums.speedlife.net/t/e-test-question/84465/6 "2005-03-24T12:08:40Z")

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Is your EGR sytem working?