I really need your help with my Pontiac Firebird?

[tanoo]

My car,94 Pontiac Firebird 3,4,refuses to start.This will be simple to fix but not in this case...I mean i know is not the battery(i try jump start) and anyways is new.the alternator is good too.When i try to start the car,engine doesn't crank or rotating,is dead ,no sound nothing i have lights and electrical part is present.But something strange happens if i wait,for like 3 days,i know this form previous experience,the car will start(even if in all this time i try to start the car many times) it needs this time to get better or something,i don't know.Is running with very weak acceleration(the rpm refuse to rise).After driving and stop the car will not start again for 3-4 days....the fuel filter,spark plugs,cables,battery are new.I did the injection cleaning at the mechanic.
Any ideas?If is the fuel pump why the car starts after few days?
Thank you!

 

[Joshua]

its your starter im about 99.9% sure find where it is on your car it needs to be replaced its tht bad it will like have corrosion and wasnt covered really good so im sure thats what it is if you checked everything