First I'd like to thanks anybody that will not complain about my english 
I had some troubles with my Alero when starting it. The guys at the garage told me I had to clean my injector. I asked a friend of mine who is a mech and she told me that I could try the fuel injector cleaner before as it was only like 10$. So I believe the whole thing started there, when I used a STP fuel Injector Cleaner (the regular one). My engine was getting better, less chokes and everything but then my engine started to shake and smell like a lawnmower. We took the car, drove it in the highway and suddenly it got back to the nice, smoking-free car I had before ! We first tough that it was only junk that have taken off and that was blocking my cylinder ( so I was using like 5 or 4 cylinder instead of 6) or whatever it was. Seems like there's not enough intake and too much gas?
But
no.
It came back and now it is worst. I can't start my car, when I finally manage to do it, it smells gas alot, I can't put my car on D because it chokes (the idle is rude) and gas is even dripping from my exhaust. I can't tell you how my car smokes too.
Help?
Oh and I just changed my spark plugs, things are getting better, the only problem is the start and the idle. There's no problem when I accelerate.
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