First Generation Firebird-L Mailing List
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Danny,

Most cars I see doesn't have the TVS connected.
Probably because the owners don't understand it's purpose and think it's
some "power robbing emission thingy".
In fact it's there to prevent your engine from overheating.

At normal operating temperature the TVS provide the distributor with
ported vacuum.
If the temp rises and is about to overheat the TVS switch to manifold
vacuum and the ignition gets more advance.
This way the engine cools down. You guys with overheating problems, do
you have your TVS hooked up?

/Niklas
  



First Generation Firebird-L Mailing List
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.
Thanks Thomas,

I did quite a bit of searching before posting here but I guess I just
wasn't typing the right search terms to come up with the right info.  I
appreciate your knowledge.  The link you sent was informative but isn't
quite getting me the answer.

- There is only one vacuum port on the back of the carb, dead center
below the throttle body at the base of the carb.

- I wouldn't have thought anything strange about the vacuum going
straight from the carb to the distrib. advance except that the service
manual info, and other stuff I have found has the vacuum going from the
TVS to the advance port on the distributor and not straight from the
carb.

Thanks for helping a Firebird newbie (and a carb newbie).  I'll keep
doing internet searches as well.  Just setup a PC in the garage high on
the workbench at the front of the car so I can look stuff up without
running in and out or having to print things.  :)

Danny Dutch
[email protected]


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