1991 Mercury Capri Convertible?

[The one and Only]

I bought this car and it has 84k miles on it thus far. Its a good little car and hasn't given me any trouble so far. The only thing that I am wondering is that it doesn't seem like it has the power it should. Well the story behind this car is that my neighbor bought it from his neighbor a while back because his neighbors never used the car. It would sit for months at a time and would be turned on every once in a while. Well, when they sold the car to my neighbor, he hardly ever used it either. It again sat for months at a time an he would only turn it on and drive it every once in a while too. i know there is a lack of power, the car will get up to speed, don't get me wrong but the acceleration is slow. WHy could this be? Does it just need a god tune up? What do I need to change or examine to get this car in tip top shape? I mean it only has 84k miles on it so its still young and has plenty of power I am assuming if it is given a god tune up. Also, the car idles at about 3,000 RPM then comes down to about 1200-1300 RPM at the very least while in park. For a little car(1.6L DOHC) is it idling way too high? I have never had a DOHC so I wouldn't know about them. The car runs about 3,000 RPM going about 60MPH. Is this normal? I have never had a car that ran that high before. Do I need to adjust the Idle on it? I appreciate your answers, please, whatever you think I might need to do to the car since its been sitting for so long, do not hesitate to give input, thank you very much!

 

[Old Man Dirt]

This uses the same engine as the Miata, which is not a dog!
But with the car sitting so much the tank could have started to rust and this rust is/has blocked what I call the "sock". This is the filter on the fuel pump.
Also, the regular gas filter may have become blocked and need replacement.
It would not hurt to pull the plugs and clean them (use some anitsieze on them when you put them back in). That is if you can get them out.
Check all the intake system for rats nests and the such. Check the vacuum lines. The one that goes to the fuel pressure regulator for sure.
Use some systems cleaner and new plug wires will help.
Have a professional replace the cam belt, these die due to age just as fast as due to mileage.