Start off the car will vibrate & then smooth out and run great lots of power, does not skip.

If you have an automatic transmission, I would check 1) the fast idle thermo-valve. 2) the starting air valve, and 3) the IAC valve. The IAC valve and the Fast Idle valve are on the front of the cover that has PGM-FI on the top. They are connected at the bottoms by small water hoses. The starting air valve is at the right hand end (facing the car) of that cover. All of these valves affect your starting air mixture, in one way or another. They get dirty, or the vacuum hose to the starting valve might start leaking.
You will probably need a manual (Haynes) to go through checking procedures. It has good pics and describes what to do, but many owners simply take the two bolts out of the IAC valve and out of the Fast Idle Valve, pull them back without disconnecting the water hoses, and spray the insides of them (especially the screen in one of the two IAC holes) with a good dose of carb cleaner, reassemble and see if that makes things better. The vacuum hose on the starting valve should be carefully checked. .
Hope this gets you started on a fix.