86.1811-01 Emission standards, light-duty vehicles.
This section applies to 2001 and later model year
light-duty vehicles fueled by gasoline, diesel, methanol,
natural gas and liquefied petroleum gas fuels except as
noted. Multi-fueled vehicles shall comply with all
requirements established for each consumed fuel. For
methanol fueled vehicles, references in this section to
total hydrocarbons shall mean total hydrocarbon equivalents
and references to non-methene hydrocarbons shall mean nonmethane
hydrocarbon equivalents.
(a) Exhaust emission standards.
(1) Exhaust emissions shall not exceed the following
standards at intermediate useful life:
(i) Total hydrocarbons: 0.41 grams per mile, except
natural gas, which has no standard.
(ii) Non-methane hydrocarbons: 0.25 grams per mile.
(iii) Carbon monoxide: 3.4 grams per mile.
(iv) Oxides of nitrogen: 0.4 grams per mile except
diesel fuel which has a 1.0 gram per mile standard.
(v) Particulate matter: 0.08 grams per mile.
(2) Exhaust emissions shall not exceed the following
standards at full useful life:
(i) [Reserved]
(ii) Non-methane hydrocarbons: 0.31 grams per mile.
(iii) Carbon monoxide: 4.2 grams per mile.
(iv) Oxides of nitrogen: 0.6 grams per mile except
diesel fuel which has a 1.25 gram per mile standard.
(v) Particulate matter: 0.10 grams per mile.
(b) Supplemental exhaust emission standards.
(1) Supplemental exhaust emissions from gasoline-fueled
and diesel-fueled light-duty vehicles shall not exceed the
following standards at intermediate useful life:
(i) Nonmethane hydrocarbon and oxides of nitrogen
composite: 0.65 grams per mile except diesel fuel which has
a 1.48 gram per mile standard.
(ii) Carbon monoxide. Regulated vehicles shall meet at
least one of the following two sets of standards:
(A) Individual US06 and SC03 Air Conditioning
compliance. Comply with both the following standards:
(1) 3.0 grams per mile on the A/C test, not applicable
to diesel fueled vehicles, and
(2) 9.0 grams per mile on the US06 test.
or
(B) Composite Carbon Monoxide Standard: 3.4 grams per
mile.
(2) Supplemental exhaust emissions from gasoline-fueled
and diesel-fueled light-duty vehicles shall not exceed the
following standards at full useful life:
(i) Nonmethane hydrocarbon and oxides of nitrogen
composite: 0.91 grams per mile except diesel-fueled which
have a 2.07 gram per mile standard.
(ii) Carbon monoxide. Regulated vehicles shall meet at
least one of the following two sets of standards:
(A) Individual US06 and SC03 Air Conditioning
compliance. Comply with both the following standards:
(1) 3.7 grams per mile on the A/C test, not applicable
to diesel fueled vehicles, and
(2) 11.1 grams per mile on the US06 test.
or
(B) Composite Carbon Monoxide Standard: 4.2 grams per
mile.
(c) Cold temperature exhaust emission standards.
Exhaust emissions from gasoline-fueled light-duty
vehicles shall not exceed the cold temperature CO standard
of 10.0 grams carbon monoxide per mile for an intermediate
useful life of 50,000 miles.
(d) Evaporative emission standards.
Evaporative emissions from gasoline-fueled, natural
gas-fueled, liquefied petroleum gas-fueled, and methanolfueled
light-duty vehicles shall not exceed the following
standards. The standards apply equally to certification and
in-use vehicles. The spitback standard also applies to newly
assembled vehicles.
(1) Hydrocarbons
(A) For the full three-diurnal test sequence, diurnal
plus hot soak measurements: 2.0 grams per test.
(B) Gasoline and methanol-fueled only. For the
supplemental two-diurnal test sequence, diurnal plus hot
soak measurements: 2.5 grams per test.
(C) Gasoline and methanol-fueled only. For the
running loss test: 0.05 grams per mile.
(D) Gasoline and methanol-fueled only. For the fuel
dispensing spitback test: 1.0 gram hydrocarbon (carbon for
methanol-fueled) per test.
(e) Refueling emissions. Refueling emissions from 2001
and later model year light-duty vehicles shall not exceed
the following standards.
(1) For gasoline-fueled, diesel fueled, and methanolfueled
vehicles: 0.20 grams hydrocarbon per gallon (0.053
gram per liter) of fuel dispensed.
(2) For liquefied petroleum gas-fueled vehicles: 0.15
grams hydrocarbon per gallon (0.04 gram per liter) of fuel
dispensed.
(f) Certification short test.
Certification short test emissions from gasoline-fueled
Otto-cycle light-duty vehicles shall not exceed the
following standards:
(1) Hydrocarbons: 100 ppm as hexane.
(2) Carbon monoxide: 0.5%.
I know alot of people that will put a halfgallon of rubbing alcohol in the tank before the emissions test and it drops all the results down a bit...i guess its probably the same as adding in some E85