1999 Acura Integra Auto 144k
NO is the only problem - other measurements are much lower than the MAX values.
2021 Results compared with others:
Test MAX AVE 21-MEAS 19-Retest 2019 2017 2015 2013 2011
15mph 467 67 357 146 693 462 445 442 246
25mph 754 62 1079 646 8 34 44 78 72
2019 Re-tesst increased the NO value at 25mph from 8 to 646! Historical max for NO at 25mph is only 78!
Mystery is how it jumped from 78 (or 8) to 646 after all the tune ups?
Before re-test, I used CatClean as well.
Did CatClean brought the carbon into the CAT and resulted in high NO at 25mph?
He says he poured 1 gal of Shop solvent into the half tank of gas and drove - he fixed 100’s of cars.
Other think he said was remove the CAT and soak it in soap overnight.
OTH, NO is worsened at 15mph up until I used CatClean. Last test, it is only 100 lower than the MAX value. Until the 2019 failed SMOG, I do not warm up the car for SMOG as it had reliably passed. High NO at 15mph may reinforces the idea of aged CAT. Yet it might be cleaned?
There are others using CRC and Heet to pass the SMOG.
Any recommendation looking at the SMOG measurements?
Also, I use Long Life coolant (5 yr) - I still change every 4 yrs. Last time I did it was in Summer 2017. I am driving 4k annually on this car. So my Air filter is 2yrs old with 8k miles. FI cleaner (red bottle) was used in 2019 as well. Mobil1 oil was put in 4k miles ago. Battery and Alternator were checked to be fine. O2 sensor is a few yrs old from Honda.