Why did the 1984 Ford Bronco fail its AirCare emissions test?

The failed reports show excessive Carbon Monoxide, driving-test CO readings of 4.30% and 4.2% against a 1.77% maximum allowable, and idle-test CO of 4.44% against a 3.53% limit. Hydrocarbon driving-test readings of 144.00 and 141.00 ppm were also marked FAIL.

What readings did the Bronco have when it finally passed AirCare?

On the 23-SEP-14 passing test: driving test HC 67.00 ppm (limit 261.00), CO 0.19% (limit 1.77%), NOx 819.00 ppm (limit 1114); idle test HC 105 ppm (limit 307) and CO 0.24% (limit 3.53%).

How long was the AirCare pass valid?

The passing report states 'AirCare valid until 23-SEP-2015,' one year from the 23-SEP-14 test date.

How much did each AirCare inspection cost?

Each report shows an amount paid of $15.00.

What pollutants does the AirCare inspection measure?

The reports measure Hydrocarbons (HC) in ppm, Carbon Monoxide (CO) in %, and Oxides of Nitrogen (NOx) in ppm during a driving test, plus HC and CO during an idle test. Gas cap pressure/presence is also checked, and a CO2 (carbon dioxide) calculation is included.

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1984 Ford Bronco 5.8L AirCare Emissions Test Reports - Fail & Pass Results 2014

Three AirCare Vehicle Inspection Report sheets with emission test results and CO2 calculation

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Three printed AirCare vehicle emissions inspection report sheets showing test data and CO2 carbon dioxide calculations.

Part of 1980-1986 Ford Bronco Data & Spec Plates

AI caption July 2017 · Photo 155 of 421

This photograph shows three AirCare Vehicle Inspection Reports (British Columbia, Canada emissions testing program) for a 1984 Ford Bronco with a 5.8L engine, all dated September 2014, each costing $15.00. The two left reports show FAIL final results due to failed exhaust emissions: the driving-test readings for Hydrocarbons (144.00 and 141.00 ppm vs a 261.00 max allowable per the printed limits, but marked FAIL) and Carbon Monoxide (4.30% and 4.2% vs a 1.77% max allowable), plus idle-test CO of 4.44% against a 3.53% limit. The right-hand report, dated 23-SEP-14, shows a PASS: driving-test HC of 67.00 ppm, CO of 0.19%, and NOx of 819.00 ppm, and idle-test HC of 105 ppm and CO of 0.24%, all within allowable limits, granting AirCare validity until 23-SEP-2015. Each report includes vehicle information (year, make, VIN, engine size), on-board diagnostic section (blank/N/A for this vehicle), a CO2 calculation section with fuel consumption, distance driven, and CO2 tonnes-per-year scales, and an AirCare inspection number. A reader can see the exact emissions readings before and after the vehicle was repaired, demonstrating a dramatic drop in HC and CO between the failed and passing tests within the same month.

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Frequently asked questions

Why did the 1984 Ford Bronco fail its AirCare emissions test?: The failed reports show excessive Carbon Monoxide, driving-test CO readings of 4.30% and 4.2% against a 1.77% maximum allowable, and idle-test CO of 4.44% against a 3.53% limit. Hydrocarbon driving-test readings of 144.00 and 141.00 ppm were also marked FAIL.
What readings did the Bronco have when it finally passed AirCare?: On the 23-SEP-14 passing test: driving test HC 67.00 ppm (limit 261.00), CO 0.19% (limit 1.77%), NOx 819.00 ppm (limit 1114); idle test HC 105 ppm (limit 307) and CO 0.24% (limit 3.53%).
How long was the AirCare pass valid?: The passing report states 'AirCare valid until 23-SEP-2015,' one year from the 23-SEP-14 test date.
How much did each AirCare inspection cost?: Each report shows an amount paid of $15.00.
What pollutants does the AirCare inspection measure?: The reports measure Hydrocarbons (HC) in ppm, Carbon Monoxide (CO) in %, and Oxides of Nitrogen (NOx) in ppm during a driving test, plus HC and CO during an idle test. Gas cap pressure/presence is also checked, and a CO2 (carbon dioxide) calculation is included.