Ok here the problem on my 93 GT (stock) when i start the car & drive about 8 miles or so it drives just fine, after that it starts acting like its' missfiring but more like a dead miss, the RPM needle be bumping really fast 1 or 2 seconds apart.
A little more into detail New wires, plugs (Autolite), rotor, cap, ignition module, coil, and temp sensor i added a temp sensor cause my needle was showing high & i also put a new water pump on. I put the car on a friends computer & it said left lean bank is going bad CODE: 91 or 92 but that was a 02 sensor going bad so i changed that, now it's telling me tps i think the only reason it says to check the tps cause we got the car set @ 12 degr..
just trying to find out what changes from when the car is running cold to when it reaches operation temp...

[IMG]local://upfiles/70686/46760F209AF342FCBC1D28A1041CB38D.jpg[/IMG]

[IMG]local://upfiles/70686/246C4429A9EE4F7FB86467F6B491F2F5.jpg[/IMG]

[IMG]local://upfiles/70686/54226C161E354F05AED6646238B5F617.jpg[/IMG]

[IMG]local://upfiles/70686/177618A338E8492C9237AA6AAFE5ED13.jpg[/IMG]

 

Try pulling injector wires to see if one of them might be clogged or just worn out.When you get to the one that changes the RPM the least you've found a likely culprit.Swap this injector to a good cylinder and see if the miss folows.If it does,clean or replace that injector.