New Mexico Administrative Code
Title 20 - ENVIRONMENTAL PROTECTION
Chapter 11 - ALBUQUERQUE - BERNALILLO COUNTY AIR QUALITY CONTROL BOARD
Part 101 - MOTOR VEHICLE INSPECTION - CENTRALIZED
Section 20.11.101.14 - INSPECTION CRITERIA FOR AIR CARE INSPECITON FACILITIES

Universal Citation: 20 NM Admin Code 20.11.101.14

Current through Register Vol. 35, No. 18, September 24, 2024

Failure to pass any one of the applicable criteria specified below as, Exhaust Emissions; Anti-Tampering; or Visible Emissions (smoke), referred to respectively as Subsections A, B, C, of 20.11.101.14 NMAC, shall constitute noncompliance with 20.11.101 NMAC, and a fail VIR shall be issued.

A. Exhaust Emissions: Inspection procedure for all vehicles other than diesel-powered vehicles shall be consistent with the requirements specified in 40 CFR Part 51 Subpart S Appendix B.

(1) A non-diesel motor vehicle manufactured on or before the 1980 model year shall be required to take and pass only the idle mode test condition. A non-diesel motor vehicle manufactured in or after the 1981 model year shall be required to take and pass both the loaded test condition (except as specified in Paragraph (2), of Subsection A of 20.11.101.14 NMAC for full time four wheel drive) and the idle mode test condition.
(a) Loaded mode condition: Vehicles tested under the loaded mode shall have the drive wheels placed on a dynamometer and the vehicle shall be operated as prescribed in Table I, in drive for automatic transmissions and 2nd or higher gear for manual transmissions. Exhaust reading for HC and CO shall be recorded after readings have stabilized or at the end of 30 seconds, whichever comes first. After exhaust emissions have been recorded, engine speed shall be returned to idle for the idle mode test.

(b) Idle mode test condition: The idle mode test shall be performed with:
(i) the vehicle in drive for pre 1981 model year vehicles with automatic transmissions, or

(ii) in neutral both for, vehicles with manual transmissions and for post 1980 model year vehicles with automatic transmissions. Exhaust emissions shall be recorded for HC and CO concentrations after readings have stabilized or at the end of 30 seconds, whichever occurs first. A CO2 reading less than 6% will be deemed as proof of exhaust sample dilution, and the vehicle shall be rejected from further emissions inspections until the vehicle is repaired. The vehicle owner will be provided with an INVALID VIR.

(2) 1981 and newer constant four wheel drive vehicles shall be inspected and required to pass an unloaded 2500 rpm + 300 rpm test ("set RPM") and an idle mode test. The appropriate maximum allowables listed in Table II shall apply to both test conditions. Vehicle transmissions shall be placed in neutral. During the unloaded 2500-rpm test exhaust emissions for HC and CO shall be recorded after the engine reaches set rpm and readings have stabilized. A sampling algorithm shall allow for sampling system delay. If the recorded readings are below the appropriate maximum allowable (PASS), the unloaded 2500-rpm test shall terminate and the engine speed shall be returned to idle for an idle mode test. If the recorded readings at 2500 rpm are above the appropriate maximum allowables (FAIL), real time sampling shall continue until the vehicle either passes or ninety (90) seconds have elapsed, whichever occurs first. After final exhaust emissions reading have been recorded, engine speed shall be returned to idle for an idle mode test. The idle mode test shall be performed as described in Subparagraph (b), of Paragraph (1), of Subsection A of 20.11.101.14 NMAC.

(3) Conditioning mode: If a non-diesel vehicle manufactured in or before the 1980 model year fails the idle mode test, and if requested by the vehicle operator, the vehicle shall be conditioned according to one of the following conditioning modes and retested at idle:
(a) Fast idle condition: For constant four wheel driven vehicles, the engine shall be conditioned by increasing the engine speed to 2500 RPM (+/-300) for a period of 30 seconds with the transmission in neutral. Exhaust emissions for HC and CO shall be recorded after the readings have stabilized or at the end of 30 seconds, whichever comes first. After the exhaust emissions at high idle have been recorded, the engine speed shall be returned to idle for an idle mode test.

(b) Loaded mode test condition: For vehicles other than constant four wheel drive vehicles, the conditioning mode shall be conducted according to Subparagraph (a), of Paragraph (1), of Subsection A of 20.11.101.14 NMAC.

TABLE I

DYNAMOMETER LOADING TABLE

PASSENGER VEHICLES AND TRUCKS

Gross Vehicle Weight Rating (Pounds)

Engine Size

Speed (MPH)

Load (HP)

8500 or less

4 cyl or less

22 - 25

2.8 - 4.1

8500 or less

5 or 6 cyl

29 - 32

6.4 - 8.4

8500 or less

8 cyl or more

32 - 35

8.4 - 10.8

8501 or more

all

37 - 40

12.7 - 15.8

(4) Any motor vehicle which is determined to emit quantities (rates) of carbon monoxide and hydrocarbons greater than those listed in Table II appropriate to model year and weight classification listed shall be FAILED and those with emission rates equal to or lower than the applicable amounts shall be PASSED under this subsection.

TABLE II

MAXIMUM ALLOWABLE EMISSIONS STANDARDS

Vehicle Model Year

Gross Vehicle

Rating

(Pounds)

Group Code

IDLE I

MODE

LOADED

MODE OR

UNLOADED

2500 RPM

TEST

HC PPM

CO

%

HC PPM

CO

%

1975-1976

0 to 6000

C/T

700 600

6.0

--

--

1977-1978

0 to 6000

C/T

5.0

--

--

1979-1980

0 to 6000

C/T

500

220

4.0

--

--

1981- newer

0 to 6000

C/T

1.2

220

1.2

1975-1978

6001 to 8000

LT

900

6.0

--

--

1979-1980

6001 to 8000

LT

750

4.5

--

--

1981-1982

6001-8000

LT

650 400

2.7

400

3.0

1983-newer

6001-8000

LT

1.2

300

3.0

1975-1980

8001-10,000

MT

950

6.5

--

--

1981-1983

8001-10,000

MT

800

5.4

450

3.5

1984-newer

8001-10,000

MT

630

4.0

400

3.0

1975-1980

10,001 to 25,999

HT

950

6.5

--

--

1981-1986

10,001 to 25,999

HT

800

5.5

500

3.5

1986-newer

10,001 to 25,999

HT

440

2.0

400

3.0

Note: These criteria will be reviewed by the Board annually pursuant to the State Implementation Plan for Albuquerque/Bernalillo County. Adjustments will be promulgated as appropriate.

B. Anti-tampering:

(1) Motor vehicles subject to this Part shall be inspected for the presence and proper connections of original design features and components designed to reduce CO and HC exhaust emissions. The features and components are as follows:
(a) Catalytic converter;

(b) Oxygen sensor;

(c) Air pump or air aspiration system as applicable.

(2) Any vehicle with such features or components removed or rendered inoperative shall be FAILED under this subsection. If no tampering is evident with these components or systems, this portion of the inspection shall be PASSED.

C. Visible Emissions (Smoke): All non-diesel vehicles subject to inspection must pass an inspection for visible emissions. The inspection for visible emissions shall be conducted after the anti-tampering inspection and prior to the exhaust measurement inspection.

(1) The vehicle must be placed in neutral gear with the parking brake secured and all accessories off.

(2) The engine speed shall be raised to approximately 2000 RPM and held constant for 10 seconds.

(3) If visible emissions are emitted for a period of two consecutive seconds, the vehicle shall FAIL this portion of the inspection.

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