On Mon, 24 May 2004 17:04:36 UTC "Bone P.A." <bp@charter.net> wrote:

> No, I did not. I drove it over city streets a few miles to the Smog Check
> Station. No one ever mentioned I needed to "break in the Cat." Why is that?
> Where is this type of information documented?

Has nothing to do with breakin. The 20 minutes is to insure that the
cat actually is up to temp and in it's working range. Last summer I
had to get an emissions check and had to let it sit outside for a
couple of hours before we could get the bay open. Just for curiosity
- mine and the shop owner - we fired it up and ran the sniffer cold.
Ran it around the neighbor hood for 15-20 minutes, tested again. Took
it out on the freeway and ran it at 70-75 for about 30 miles then
tested a third time. The cold check failed miserably, the light
warmup helped a lot but it was still marginal. After the highway run,
all readings were low to midrange. Convincing enough the make that a
standard recommendation for that shop, especially for older vehicles.

--
Will Honea

 

On Mon, 24 May 2004 17:04:36 UTC "Bone P.A." <bp@charter.net> wrote:

> No, I did not. I drove it over city streets a few miles to the Smog Check
> Station. No one ever mentioned I needed to "break in the Cat." Why is that?
> Where is this type of information documented?

Has nothing to do with breakin. The 20 minutes is to insure that the
cat actually is up to temp and in it's working range. Last summer I
had to get an emissions check and had to let it sit outside for a
couple of hours before we could get the bay open. Just for curiosity
- mine and the shop owner - we fired it up and ran the sniffer cold.
Ran it around the neighbor hood for 15-20 minutes, tested again. Took
it out on the freeway and ran it at 70-75 for about 30 miles then
tested a third time. The cold check failed miserably, the light
warmup helped a lot but it was still marginal. After the highway run,
all readings were low to midrange. Convincing enough the make that a
standard recommendation for that shop, especially for older vehicles.

--
Will Honea

 

On Mon, 24 May 2004 17:04:36 UTC "Bone P.A." <bp@charter.net> wrote:

> No, I did not. I drove it over city streets a few miles to the Smog Check
> Station. No one ever mentioned I needed to "break in the Cat." Why is that?
> Where is this type of information documented?

Has nothing to do with breakin. The 20 minutes is to insure that the
cat actually is up to temp and in it's working range. Last summer I
had to get an emissions check and had to let it sit outside for a
couple of hours before we could get the bay open. Just for curiosity
- mine and the shop owner - we fired it up and ran the sniffer cold.
Ran it around the neighbor hood for 15-20 minutes, tested again. Took
it out on the freeway and ran it at 70-75 for about 30 miles then
tested a third time. The cold check failed miserably, the light
warmup helped a lot but it was still marginal. After the highway run,
all readings were low to midrange. Convincing enough the make that a
standard recommendation for that shop, especially for older vehicles.

--
Will Honea

 

Roughly 5/24/04 09:59, Bone P.A.'s monkeys randomly typed:

> Don't know. I keep it tuned and it isn't a daily driver. Also I didn't that
> it for along drive after getting the Cat. Conv put it. Why does that seem to
> make a difference?
>
>
If you can get a retest, take it out and run it on the freeway for at
least 10-15 minutes so the engine is good and hot. Before you do
this, fill the tank with something like Chevron premium.

--
Me human. You Computer. Me have BFH. You have fragile parts. You behave.

 

Roughly 5/24/04 09:59, Bone P.A.'s monkeys randomly typed:

> Don't know. I keep it tuned and it isn't a daily driver. Also I didn't that
> it for along drive after getting the Cat. Conv put it. Why does that seem to
> make a difference?
>
>
If you can get a retest, take it out and run it on the freeway for at
least 10-15 minutes so the engine is good and hot. Before you do
this, fill the tank with something like Chevron premium.

--
Me human. You Computer. Me have BFH. You have fragile parts. You behave.

 

Roughly 5/24/04 09:59, Bone P.A.'s monkeys randomly typed:

> Don't know. I keep it tuned and it isn't a daily driver. Also I didn't that
> it for along drive after getting the Cat. Conv put it. Why does that seem to
> make a difference?
>
>
If you can get a retest, take it out and run it on the freeway for at
least 10-15 minutes so the engine is good and hot. Before you do
this, fill the tank with something like Chevron premium.

--
Me human. You Computer. Me have BFH. You have fragile parts. You behave.

 

Roughly 5/24/04 09:59, Bone P.A.'s monkeys randomly typed:

> Don't know. I keep it tuned and it isn't a daily driver. Also I didn't that
> it for along drive after getting the Cat. Conv put it. Why does that seem to
> make a difference?
>
>
If you can get a retest, take it out and run it on the freeway for at
least 10-15 minutes so the engine is good and hot. Before you do
this, fill the tank with something like Chevron premium.

--
Me human. You Computer. Me have BFH. You have fragile parts. You behave.

 

Bone P.A. (bp@charter.net) wrote on Monday 24 May 2004 12:04 pm:

> No, I did not. I drove it over city streets a few miles to the Smog Check
> Station. No one ever mentioned I needed to "break in the Cat." Why is
> that? Where is this type of information documented?

When I lived in the Chicago suburbs, the emissions letter they mailed
explicitly said not to test with a cold engine, and to let your car warm up
for at least 20 minutes. Of course, in Chicago traffic, it usually took at
least 20 minutes to get anywhere.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891

 

Bone P.A. (bp@charter.net) wrote on Monday 24 May 2004 12:04 pm:

> No, I did not. I drove it over city streets a few miles to the Smog Check
> Station. No one ever mentioned I needed to "break in the Cat." Why is
> that? Where is this type of information documented?

When I lived in the Chicago suburbs, the emissions letter they mailed
explicitly said not to test with a cold engine, and to let your car warm up
for at least 20 minutes. Of course, in Chicago traffic, it usually took at
least 20 minutes to get anywhere.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891

 

Bone P.A. (bp@charter.net) wrote on Monday 24 May 2004 12:04 pm:

> No, I did not. I drove it over city streets a few miles to the Smog Check
> Station. No one ever mentioned I needed to "break in the Cat." Why is
> that? Where is this type of information documented?

When I lived in the Chicago suburbs, the emissions letter they mailed
explicitly said not to test with a cold engine, and to let your car warm up
for at least 20 minutes. Of course, in Chicago traffic, it usually took at
least 20 minutes to get anywhere.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891