WebJan 30, 2024 · High NOx is caused by elevated combustion temperatures. Some of things that can cause high NOx readings are, a malfunctioning EGR system, an engine that’s … WebAug 23, 2014 · The maximum amount of HC's allowed on the smog is 58 at 15mph and 34 at 25mph. My NOx levels were VERY high double the maximum limit. At 15mph my car measured 1390 of NOx and the limit is 483 and at 25mph it measured at 1159 and the limit is 494. I went to a muffler shop and had a magnaflow cat installed and had the car retested.
Just had smog and failed. reason high NOX at 15MPH. What are…
WebI have a 1998 328is. Went to smog at a test-only center and it failed. 15mph: HC max = 55, meas 91 (fail) 15mph: NO max = 437, meas 532 (fail) RPM = 1651. 25mph: HC max = 39, … WebNov 14, 2024 · High compression results in high temperatures and high NOx. Keep in mind this problem is usually seen in vehicles with over 150,000 miles which have been poorly … delete browsing history last 10 days
Help; failed CA smog test. High NO BimmerFest BMW Forum
WebOct 31, 2024 · I went to go smog it and it only fails NOx at 15 mph. But at 20mph it passes with flying colors which the smog guy says its very weird that its in two different extremes. Im going to check base timing and my egr when I … WebNov 14, 2024 · High compression results in high temperatures and high NOx. Keep in mind this problem is usually seen in vehicles with over 150,000 miles which have been poorly maintained. The solution to this problem is called De-Carbonizing. It usually costs around two labor hours at a smog check repair station. WebSep 9, 2012 · 15mph 14.8 - 0 - 1 - .02 - 655 25mph 14.8 - 0 - 1 - .01 - 0 Those are all the measured numbers The 15mph max for NO is 467, and that is the only thing I failed. So to make this clear, I have 2 questions 1. Does the missing exhaust component deal with NO? 2. Why does the NO number drop to 0 at 25mph? delete browsing history not passwords