blueoval9erlifer
Well-Known Member
- Joined
- January 16, 2012
- Messages
- 159
- Reaction score
- 1
- City, State
- OAK HILL, KANSAS
- Year, Model & Trim Level
- 04 explorer XLT
Changed the spark plugs, boots and springs in my 04 xlt 4.6l this weekend and was told when i bought the plugs did not need the gapping info from the parts store because they are pregapped from the factory. I always check this anyway but my gap is supposed to be .052 to .056 the new plugs were all at .040 old ones i took out 91,000 miles on vehicle ( i just bought it) were all at a .066 to .070 just worn down from driving. Guess what im saying is to always have a gapping tool available and double check because the factory setting for this is obviously not right.
Also swiss cheesed air box put 5 1 1/4 inch holes in it to start with and seems to make a difference ill know more in a couple of weeks but i wish i had done this alteration after driving with new plugs to see which makes a bigger difference in mpg.
Also swiss cheesed air box put 5 1 1/4 inch holes in it to start with and seems to make a difference ill know more in a couple of weeks but i wish i had done this alteration after driving with new plugs to see which makes a bigger difference in mpg.