1997 Toyota RAV4 "failed smog test high" Questions

...FAILED SMOG BECAUSE OF 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 ...

...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 internal ...

...failed) @ smog check 1985 Volvo DL fuel evaporative control functional (failed) at smog check replace the pvc valve and have the egr valve replace.make sure the vacuum hoses connect to egr valve and ...

failed smog test just bought 95 jeep cheeroke laredo and it was smogged in feb and passed try to smog today and it failed the NO at 15 mph is high-and pcv failed also what should i do? trade it in on ...

failed smog hc too high the truck failed a smog in california with hc levels at 146, 126 was acceptable. It passed at 15 mph, failed at higher rpm test. what do I do to start? About the only thing you

failed smog test high on emissions wont pass smog test. replacement of catalic converter, o2 sensor, pressure regulator, fuel injectors, throttle body Most modern vehicles have 2 catalytic ...

Failed Smog Test - 4 codes for 2001 Isuzu Rodeo My 2001 Isuzu Rodeo has 124K miles on it. Failed smog test for first time today and threw codes: P0463 (Fuel level sensor CKT High Input), P0300 (Random

smog test at 15mph 112 HC on the 25 mph 43 HC you may need replace the catalytic converter, but 1st do this, clean the throttle body and idle airbypass valve, change the oil before the retest as well,

...a smog test? if you did... i always pass smog because i always have a new catalytic converter installed .if i was a little over the test, this usually gets me down a little lower and that's