Chevy ven. 05 very difficult to start and install at idle or very slowly did

What is your question?

Did tune up and changed coils and module Problems occurred always it is been for a while What seems to make the problem better or worse? When start after long time of parking car it start fairly easy with shaky engine it install after that and doesn't start till I push gas hard How long have you had this problem? Over 7 months but I don't drive long milage