Doesn't sound like a dramatic failure to me. New dizzy should help. If the
auto-choke has not been working the carbs may be set a little rich to help
starting - so the should be the scope to lean it down, as long as you can
still start it. The warm afternoon will help.
Check the regulations. Here in the UK when emission testing became part of
the MoT test, after lots of late MGB's in fine condition were failing there
was a concession to test at a faster idle speed, which allows everything to
work slightly better.
Best of luck
Neil
----- Original Message -----
From: <Eganb@aol.com>
To: <Triumphs@autox.team.net>; <british-cars@autox.team.net>;
<tr8@mercury.lcs.mit.edu>
Sent: Monday, February 05, 2001 3:41 PM
Subject: TR7 BFH#52 - Failed emissions test
> Well, the good news is my newly-reassembled TR7 passed the safety
inspection
> today. The bad news is that it flunked the emissions test.
>
> I need a 2% CO reading, and mine was 3.14%.
>
> So, now I need to strategize on how to fix this. Here are my thoughts, so
> chime in with your comments:
>
> 1. They do the emission test at idle. I'm missing the vacuum retard unit
on
> my dizzy, so the timing was probably at 10degrees BTDC, but with the
vacuum
> unit it would be less. I have a new dizzy and vacuum unit showing up
> shortly. Think that will help?
>
> 2. I can try leaning out the Stromberg-Zenith carb mixtures.
>
> 3. I have the water-temp controlled automatic choke on my carbs. The
> electrical wires that go into the choke are broken off, so whatever they
were
> suppose to do, ain't happening. Maybe the solution here is to go for the
> test in the afternoon when it is warmer?
>
> 4. I'm pretty sure the air pump doesn't do much of anything anymore. I
have
> another one, but am not sure what condition it is in. Would that make
much
> of a difference?
>
> 5. Finally, I'm going to double check the North Carolina emission
standards
> just to make sure a car this old has to pass that level of CO.
>
> Any other ideas, as always, much appreciated.
>
> later!
>
> Bruce
> 1980 Inca Yellow TR7 Convertible
> Chapel Hill, NC
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