1998 Nissan Altima "high nox readings" Questions

...are to high , this car is listed as a 1998 Altima is this correct? if so why are they testing for nox?High nox readings can be due to engine running hotter than normal or egr system not operating

High NOx Readings NOx GPM at 1,8009 probably flooding and ruined catalytic converter

...NOX levels too high causeing pre detenation please help me? Am I right or something missing ? Is my ECM have a short between the connection to egr selonoid to ECM ??? Hello, The EGR solenoid is ...

NOx is to high what would cause that? What causes High NOX EmissionsThousands of technicians have faced the challenge of bringing a particularly stubborn application into compliance for NOx emissions.

...high NOx reading can be caused by any conditions that make the engine run lean. Vacuum leaks will dilute the fuel/air mixture with excess air leading to lean running. Lean mixtures lead to high ...

...high NOx reading at idle. passed perfect at high rpm , failed at idle. hat causes a high NOx reading? NOX is produced when cylinder temperatures exceed 2500 f. Your vehicle has 2 ways to directly ...

high nox reading everything passed on the emissions except the nox reading. What and where do I go from here? Trying to fix this problem on my own with very little tools. If I have a leak on a hose or

...high nox 25 test 15 test hc 7 9 co .02 .13 no 1354 172 fails emissions test on the 25 test. allowable nox is 712 but i'm almost double. initially it had failed on both tests with readings in the ...

...high emissions in each category. I replaced the Catalytc Converter. It passes with the very best readings in all catagories, but FAILS IN ONE: the failing is with NOX reading at 15MPH. Please can you ...

...high NOX Hi I just got SMOG checked on my Sonata V6 2001 and failed due to high NOx(reading-836 where average is around 18). I have 72K miles on the car and it just runs fine with no issues at all. ...