I have a 1992 LX 5.0 that lopes when you start it up but smooth's out some after it warms up. Once it warms up it's hard to start. I replaced the FI throttle valve without any luck. I did unplug the connector going to the EGR valve and it didn't change the way it ran. Maybe the EGR valve is bad. Any advice anyone?

 

I'd start by pulling codes, sounds like you may have a couple stored. Those might point you in the right direction. Good luck

Post back with what codes you get if you need help.