Weber Jet Pac for 32/36 4Cyl AppIn the past couple of years the quality of our fuel has changed drastically in different regions of the US. It changes from summer to winter and seems to be different in Los Angles or Maine compared to Texas to Alaska. To keep up with the Government mandated leaner, oxygenated fuel we have made 3 increases in jet size to accommodate the new fuel. A properly jetted carb, that worked great a couple of years ago, may have lost some of its performance due