I have been having an issue when trying to start my truck when warm and sometimes when cold where it just wants to spin and not fire aka its "hard starting". This hard starting issue has only nearly left me stranded once but I hate it when I go somewhere and return to start my truck and have to run the starter for about 3-7 seconds before it finally takes off. once it starts running it will run a little rough but if I give it some throttle it will even out and run fine. I've replaced the coil with a new Bosch unit and have a new set of Denso wires and cap and rotor are fairly new so that stopped the crappy idle/running I had when first driving the truck after getting it back on the road. I also set the timing according to the service manual. I was wondering if these Mikuni carbs have issues with these modern high ethanol fuels on the market today, I have heard of certain carburetors where modern fuels will boil in the bowl due to the lower boiling point of gas with ethanol in them causing hard start issues when warm and other problems. If this is the problem are there any ways of stopping this like fuel additives etc? If this isn't the problem what could it be? I'm new to carburetor's for the most part so I'm sure there could be something I'm missing?