You have to go through the vaccum line for your PCV valve on your valve cover. When I did my tuneup I did NGK Platinum V-grooves, OE spec plug wires, distrubtor cap AND rotor (the rotor was causing me to misfire and foxx up my gas mileage), air filter, fuel filter (**** that thing, that was so gay to install, luckily I was on a lift, but it was still a bitch. Took about an hour). I did an oil change, a 3 stage engine treatment (throttle body/injection system cleaner, cumbustion chamber cleaner and fuel additive). I also replaced the PCV valve which COULD kill your gas mileage. So I reccomend you do these.

1. PCV Valve
2. Air filter and fuel filter
3. Distributor cap AND rotor
4. Plugs AND wires (to be safe)
5. 3 stage treatment
6. Oil change (duh)