Car not starting up smoothly?

i own a repair shop,and you might want to try doing a good basic tune up on it ,usually this will help them it sounds like your spark plugs may be getting bad in it,and id also check the fuel filter and the air filter in it,any of these things can cause it to run like that,all this stuff can be checked,and if you don't think it needs replacing,then you can look at other things on it,but id consider giving it a real good tune up,it cant hurt it none,good luck i hope this helps.