Why did this 1990 Ford Taurus fail its 2004 California smog check?

It exceeded the Gross Polluter limits for NO (NOx) at the 15 mph ASM test: 2685 PPM measured versus a 791 PPM maximum allowable and 1992 PPM gross polluter limit. The result was 'G POL'.

Did the vehicle pass the visual and functional inspections?

Yes. The Comprehensive Visual Inspection and Functional Check both show PASS; only the emissions test failed (G POL).

What were the HC and CO readings on the ASM test?

At 15 mph: HC measured 31 PPM (max 116) and CO measured 0.01% (max 0.74%). At 25 mph: HC measured 36 PPM (max 91) and CO measured 0.23% (max 0.62%). All HC and CO readings passed.

Where was this smog check performed?

At Sunkist Unocal, 1200 N. East St., Anaheim, CA 92805, phone (714) 533-2130, station number RD139482, by technician Nazari Majid Ali /EA018546.

What was the vehicle's mileage at the time of the test?

The odometer read 076090 (about 76,090 miles) on 07/12/2004.

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1990 Ford Taurus 3.0L Smog Check VIR (2004) - Gross Polluter Fail, NOx Results

1990 Ford Taurus 3.0L California Smog Check VIR showing Gross Polluter fail

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California Smog Check Vehicle Inspection Report for a 1990 Ford Taurus 3.0L (auto): visual and functional PASS but emissions G POL, failing and exceeding gross polluter limits.

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This document is a California Smog Check Vehicle Inspection Report (VIR) dated 07/12/2004 for a 1990 Ford Taurus passenger car with a 3.0L gasoline engine, automatic transmission, 6 cylinders, and 76,090 miles on the odometer (license 4WIV122, CA). The overall result is 'G POL' — the vehicle failed and exceeded Gross Polluter limits, despite passing both the Comprehensive Visual Inspection and Functional Check. The visual/functional check table shows PASS results for PCV, catalytic converter, EGR, wiring to sensors, fuel cap tests, spark controls, vacuum lines, fuel evaporative controls, oxygen sensor, fuel injection, system malfunction light, and other emission components; several items were not applicable. The ASM emission test table shows the failure was due to NO (NOx) at the 15 mph test: 2685 PPM measured versus a 791 PPM maximum and 1992 PPM gross polluter limit; HC and CO readings passed at both speeds, and the 25 mph test passed overall. The report includes California BAR repair-assistance program information and the inspection station details: Sunkist Unocal, 1200 N. East St., Anaheim, CA 92805, station RD139482, technician Nazari Majid Ali /EA018546. A reader learns exactly which pollutant caused the gross-polluter failure and the vehicle's measured emissions values.

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Frequently asked questions

Why did this 1990 Ford Taurus fail its 2004 California smog check?: It exceeded the Gross Polluter limits for NO (NOx) at the 15 mph ASM test: 2685 PPM measured versus a 791 PPM maximum allowable and 1992 PPM gross polluter limit. The result was 'G POL'.
Did the vehicle pass the visual and functional inspections?: Yes. The Comprehensive Visual Inspection and Functional Check both show PASS; only the emissions test failed (G POL).
What were the HC and CO readings on the ASM test?: At 15 mph: HC measured 31 PPM (max 116) and CO measured 0.01% (max 0.74%). At 25 mph: HC measured 36 PPM (max 91) and CO measured 0.23% (max 0.62%). All HC and CO readings passed.
Where was this smog check performed?: At Sunkist Unocal, 1200 N. East St., Anaheim, CA 92805, phone (714) 533-2130, station number RD139482, by technician Nazari Majid Ali /EA018546.
What was the vehicle's mileage at the time of the test?: The odometer read 076090 (about 76,090 miles) on 07/12/2004.