Extremely weak on initial start up

What is your question?

When I initially start up in the morning there is no power. I have to wait till it gets close to running temperature before I have full power. Is this common or is there a problem? there are no air leaks, nothing wrong with fule system, and the air filter has been changed. Also when I'm parked and I throttle up, it will miss wnd blow out unburnt fuel out exhaust!! Any advice would be greatly appreciated