Re: Dizzy making strange noise (after going from ported to full vac)
OK, I ran slightly more scientific diagnosis. (Couldn’t find any cigs or other organic matter)
First I hooked up a straight vacuum gauge to the vacuum port on the carb. At idle it's pulling 17 inches. Then I put a 'T' into the line so I could hook one end of the line to the carb straight vacuum port, the other to the diaphragm with the vacuum gauge in the middle. At idle it's pulling a lousy 4 inches and making the flute noise. Just to confirm, I yanked the end of the line of the diaphragm, plug it with my finger and the gauge reads 17 inches again. Of course the flute noise stops.
I think this concludes the test and I need a new advance diaphragm. Not to familiar with these. Do they came rather generic or are they specific per various applications?
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