Need help tried everything!!

:
2003.5 mazdaspeed protege
I floor it and the car barely even moves. But when I first start it the car pulls strong ! And some times during the drive it pulls like crazy and when its like 50 degrees out. And my gas wont go in easily. I changed my spark plugs wires and coils and I cleaned my egr and my oil and oil filter. I also tightened all my pipes and cleaned my MAF sensor. I hit a wall guys I cant think of anything and im not throwing any codes besides for the gross gas leak.
 
What do you mean by gas won't go in easily?

And what gas leak? Where and how much? Why hasn't the leak been fixed?
 
Sorry I fixed the leak today still runs funky. And I put the gas pump in hit the trigger it for then stop goes then stops.
 
The evap system leak could be the vac lines for the charcoal canister under the hood.
 
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