E-test questions (IM240 test method)

Mnn · Oct 14, 2003

I have two questions and wondering if someone could help me.
1/ Does the vehicle mileage (>290,000 km) has any bearing on test
specification limits use for pass and fail criteria?
2/ Just received an e-test today for the car with the above mileage with a
hydrocarbons a bit high but still pass e-test at ~ 1600 rpm. Any suggestion
to improve it?

Notes:

The vehicle has a new catalic converter about three months ago
Car is running fine

Thx in advance for your help.
MN

Mike F · Oct 15, 2003

Mnn said:
I have two questions and wondering if someone could help me.
1/ Does the vehicle mileage (>290,000 km) has any bearing on test
specification limits use for pass and fail criteria?
2/ Just received an e-test today for the car with the above mileage with a
hydrocarbons a bit high but still pass e-test at ~ 1600 rpm. Any suggestion
to improve it?

Notes:

Thx in advance for your help.
MN

1.) No.
2.) In my jurisdiction (Ontario), the test ends as soon as the software
determines that you're going to pass, even if the allocated test time is
not finished. So as the catalytic convertor heats up, emissions start
falling and then when the last pollutant falls below the specified
limit, the test ends. As a result, often one of the numbers is very
close to the limit, even on very clean cars. A lot depends on how long
the car has been sitting (cat cooling off).
So you may not even have a problem. To lower hydrocarbons, change the
oil, make sure the PCV system is clean, and the normal tune up stuff is
new.

Mnn · Oct 15, 2003

Excellent information. Thank you!

Mike F said:
1.) No.
2.) In my jurisdiction (Ontario), the test ends as soon as the software
determines that you're going to pass, even if the allocated test time is
not finished. So as the catalytic convertor heats up, emissions start
falling and then when the last pollutant falls below the specified
limit, the test ends. As a result, often one of the numbers is very
close to the limit, even on very clean cars. A lot depends on how long
the car has been sitting (cat cooling off).
So you may not even have a problem. To lower hydrocarbons, change the
oil, make sure the PCV system is clean, and the normal tune up stuff is
new.

--
Mike F.
Thornhill (near Toronto), Ont.

Change cant to ca and remove parentheses to email me directly.