[blazee]

That covers all the normal maintenance items. If the rough idle persisted, that would indicate that you may have a real problem. I would check the fuel pressure. Your local Autozone should have a fuel pressure gauge as a loaner tool. You just pay for the tool, return it within 3 days and they give your money back.

The gauge attaches to the schrader valve, it is at the back of the intake on the driver's side, it looks like a big tire valve with a black cap on it:

When you turn the key on, the pump runs for 2 seconds. While the pump is running the pressure should be 60-66psi.

When the pump primes and shuts off (engine still off) the pressure should hold steady between 55-60psi.

With the engine running the pressure should drop 3-10psi depending on engine speed due to vacuum on the regulator.