while you are at it look at the seafoam treatment helps alot for tune ups
long story short
buy 2 bottles at parts store like 8 bucks a bottle
dump 1 bottle in gas tank.
dump half bottle using the vacuum from brake booster or some other method to get it into all the cylinders
once you dump half you want the car to stall out or shut it off and let the seafoam sit inside the engine for 15-20 min,
turn on car and you will see lots of smoke and hit the gas hard to get it worked in.
pour the other half in your oil100-300 miles before the oil change.
http://www.google.com/url?sa=t&sourc...tWWGNlgQdjWgIw