Hi i would like to now what could it be that i have wheezing but no cough used to be a smoker for about 25- year and quit about 4 month ago ?

Congratulations!: Wonderful that you have quit smoking; however, it sounds as if you may be having symptoms from the damage that the long term smoking has caused. The great thing is that you quit smoking! Please see a doctor and have a simple peak flow performed; the doctor will have an idea if you have lost lung function. Perhaps he/she may even have samples of an inhaler to start you on to see if you improve.