Questions & Answers for: high nox fail

...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. ...

...HIGH NOX VALUES. WE FAILED THE SMOG TEST BECAUSE OF HIGH NOX. HAS NEVER FAILED BEFORE. 1993 CHEVY SUBURBAN 1500 4X4. COMPLETELY STOCK. WHAT SHOULD I CHECK FIRST. nox is from running lean..... its ...

...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 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 fail smog test any remedies? 99 high nox fail smog test any remedies? 99 astro van changed plugs & plug wires ... Van Runs better need to pass smog nox is to high NOX is created when the ...

1999 Saturn failed emission test due to high NOx. Mileage is 103,000 km. 1.9 litre sohc high NOx is an indication of a bad egr system or the catalytic convertor

nox is high and Co's are too,what are the air/fuel settings and timing specs. Failed emissions test again,nox is high and Co's are too,what are the air/fuel settings and timing specs. make

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 hc and nox can be attributed to a faulty EGR system nox is produced when the combustion chamber temperature gets too high so a small amount of exhaust is cycled back into the air stream to help ...

...high NOX, One of them is a vacuum leak that can cause the engine to run lean. Lean engine conditions can cause high heat and that causes NOX to increase. Some things you need to look at: EGR valve ...