Mike,
what you describe is most often caused by an exhaust leak (unless you are
sure that the sound is coming from the carb, no the tail pipe).
My buddy has a terribly leaking exhaust on his Spitfire (waiting for new
pipe), and it has
exactly the sysmtoms you describe.
You can check by feeling around the exhaust connections with your hand for
leaks, best done when the engine hasn't gotten really hot yet.
Of course, your engine has plenty of other emissions-related..uh..stuff on
it that might be the culprit...
Good Luck,
Ulix
On Fri, 10 May 1996, MIKE_J2@SFOV1.VERIFONE.COM wrote:
> I'll be getting out my tools this weekend to try and find the source of a
> problem with my '78 1500 California emissions Midget. Any directions in
> the mean time would be appreciated.
>
> The symptoms: Almost everytime I shift the car gives a little pop/backfire
> as I let off the gas.
> If I've given it a healthy push on the pedal to accelerate,
> such as while merging onto the freeway, I will get a very
> healthy backfire/POP between shifts.
>
> I've replaced the air filter, put in high octane (92) gas, and fixed a
> hose leak in a breather vent line running from the valve cover. I'm
> getting about 23mpg (US) if that helps to decipher this. This weekend I'll
> be checking the timing, squirting around the carb looking for vacuum leaks,
> and generally looking for problems. Any suggestions?
>
> Mike Jaquet (honest officer, that was a backfire, not a gunshot)
>
> (Hmmm, late on a Friday, west coast of US, and I'm asking a question after
> most people have already gone home. Oh well.)
>
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'67 Sprite '66 Caddy
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