Today I was driving on the highway when all of a sudden my RPM's dropped and then came back up and continued to do this till i puled off at a gas station when I pulled into the gas station it just died so I started it up again RPM's went to 2000 then dropped idle rough quickly then died it now just continues to do this no CEL just wont stay on PLEASE help I'm out of warranty and hope this is just something simple to fix

P.S. I just replaced my fuel pump two days prior to this happening

 

As well it wasn't acting funny at all prior to the incident it kind of just happened

 

With a new one? I had the exact same problem 2 days ago and am waiting for the dealership to call me.
Fuel pump is suspected as the culprit - we'll see.

I'll give you an update as soon as I have something.

 

How many miles do you have in your engine? I came across this similar problem before I recieved my reman' but it was due to a loose positive terminal on the battery, then again, my engine lost compression 8,000 miles or so afterward. You need to find out if the spark plug, wires, and coils have been changed. Are the MAF/IAT and ES Sensors clean?

 

Could be any number of things, but unfortunately if the car was properly maintained previously I would say its blown.

First things I would check would be the simple stuff, electrical connections and the fuel pump.

Who put in the fuel pump? You can kink the line when you are replacing it if you are not careful, that could cause this problem.