Ok. So just gona provide this just in case... With the miles you have I would be doing the following if not already done.
#1. Change your sparkplugs and wires >
www.sparkplugs.com <Great Site!
#2. Replace or clean your
PCV valve / (Shake it) if it rattles easily then no need to replace just use item on #4 to clean it.
#3. Add Fuel Injector Cleaner into your gas tank. Here is an example of what the bottle looks like... I recommend Valvoline ...
#4. Fuel Injector Throttle Body Cleaner (Item on the left in the pic above)
Remove the Air Intake Tube from the throttle body and spray vigorously into the throttle body by opening up the 'butterfly' (You know that round piece that moves when you hit the gas peddle) well push it to the left and it will open up the butterfly so you can spray at will into the throttle body.
O and of coarse... replace the air filter.
Good Luck.
Let me know if you need anything else.