I had posted a few threads about a carb rebuild and ignition problems, but to no avail. After researching on my own I found it to be the Shutter valve. I was veryu surprised that no one ever suggested this to me, seeing that it is a common problem. So for anyone out there, if you car seems like it has an ignition problem or carb is failing. Go to Mazdatrix.com and type in shutter under the search. There is a GREAT article there.

lol, ive seen one shutter valve that was good, to me its got a different symptom, (sometimes they make funny nioses), than a carb or an ingnition