Well, this is what I did. I unplugged the green connector that goes to the automatic choke before it's 1st start up. It runs just as smooth as it used to. I plug it back in, I hear a solonoid on the carb click and then it runs like crap, starts dumping all kinds of black smoke and bad smell out the tailpipe. I unplug it and it runs fine, smell goes away. I take it down the road and the 1st stop sign I come to it dies. I plug it back in and I just run it down the freeway as usual. It gets up to operating temp and all is fine. Any new ideas yet?