PT Cruiser: Rough Idle

I am at a point where I want to get it out of the dealership and have it looked at by a trusted mechanic, but I was certain anything wrong would’ve been covered. I do understand the “not working on a car while one factory warranty” but I was hoping it would start up again so I could drive it to get it checked out instead of having it towed. (Money is really tight these days, and the first “fix” was inexpensive). And as for the problem not being covered,mind you the information was second hand, but my girlfriend told me that they said something along the lines of the fuel being tampered with, and therefore not a problem of faulty assembly or whatnot. This just happened today, so I’ll have to ask her (or call) to clarify.