GMC Repair: Tune up, dodge grand caravan, spark plug wires


Question
This is not a GM question but pertains to general automotive knowledge. I am hopeful you can help.
I have a 2002 Dodge Grand Caravan (3.3        liter engine). I purchased it when it had 25K miles on it. I have changed the oil regularly. It currently has 75K miles on it. It seems to be running o.k. overall, maybe just a little rough. What do I need to do to "tune up" the vehicle?
I am considering Bosch Platinum +4 plugs. I recently replaced the air filter with a K&N high performance filter. Anything else I can/should do?
Thanks for your help and consideration.  

Answer
Today's vehicles are very complex due to their respective computerized setups.

I never recommend any type of replacement parts. I use ONLY what the manufacturer recommends as far as replacement parts. The vehicle was designed and the electronics set with specific brand name components and this is what I replace them with.

If you want to switch to a different brand of air filter and spark plugs, This is your choice, But I do NOT recommend that you do so.

The only things that need to be done are:

1. New air filter.
2. new Fuel filter.
3. New plugs.
4. New distributor cap (if applicable to your specific
  vehicle design).
5. New spark plug wires.
6. New PCV valve.
7. New emissions canister filter (if applicable to your
  specific vehicle design).
8. New distributor rotor (if applicable to your
  specific vehicle design).
9. A can of DRY GAS in the fuel tank.
10. Check battery terminals for any corrosion and clean if
   necessary.
11. replace the serpentine fan belt(s) and put the old ones
   in the vehicle to be used in case of a broken belt of
   which always occurs away from home, On a Friday night
   in the rain.
12. Drain, Flush and install new anti-freeze and install a
   new thermostat.  
12. A general look around for any signs of vacuum lines
   that are cracked or appear to be extremly soft to the
   touch.


That's about all I can currently think of.



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