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Thread: Failed smog test
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Old 12-14-2019, 09:40 PM
mkzg mkzg is offline
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Join Date: Jan 2011
Location: San Diego
Posts: 61
mkzg is on a distinguished road
mkzg mkzg is offline
Member
 
Join Date: Jan 2011
Location: San Diego
Posts: 61
mkzg is on a distinguished road
So I finally passed.

Here is what I did

Seafoam The intake
Seafoam through gas tank
Drove 300 miles
Tested and failed - numbers actually got worse

Replaced Cat
Numbers immensely improved across the board - still failed due to high nox only

Replaced front o2 sensor
Passed with good numbers

So...in the end it required a seafoam treatment, cat and o2 sensor


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