I have a cavalier and it was running great all of a sudden it just quiet. I replaced the throddle position censor and it started right up.That wasquick but it started the same thing again, it will start but dies out when you try to give it gas,could i have gotten a faulty censor? any other ideas?

I have a 92 cavalier and need help with troubleshooting a problem with the car dying at a stoplight or sign after it's been running great for a good while.  The car sat for a year and I have added fuel treatment to dry out any water and have changed the crank position sensor and fuel filter.  When it dies, it will start up fine in neutral, but once it's put in gear, it dies again.  I think it's got something to do with heating up, but I don't know what to do.  Any ideas? 

Thanks alot!