Thanks to everybody who help me; I got all of them changed out! I sprayed the pb blaster on the plugs and let them set awhile then I worked the plugs back and forth until they loosing up; but before I took the plug all the way out I used a shop towel(the blue roll) and a flat head screwdriver and worked the crud out the best I could. The new plugs were put in with anti-seize on the threads. I drove it today and it drives like a new truck! Thank again for the information and encouragement to do this. PB Blaster is the S@#T!!!!! Also if anyone is changing out there spark plugs, spend the extra money and buy the Bosch Platinum+2. They made my pathfinder feel like it has extra horsepower,but maybe its just because my old ones were so worn out. THANKS AGAIN!!!