My car has a starting problem. Sometimes it start, but other times I have to push start it. I've changed the battery, spark plugs, and starter. Still it has the starting up problem. Does anyone every had the same or know how to fix it?

 

Do you mean the engine won't crank or does crank but won't start?

 

sounds low on compression. this results in flooding which you may be experiencing. you may want to try the atf treatment or use mmo. that should definatly help.