i have been having this problem for a while now as some of you may know. first i had a check engin light come on and had terribal sputtering and jerkeyness to the truck got a check engin light , i had a # 6 missfire so i changed the plugs and re-set the computer now the light is off and doesent jerk or miss like it did. over the weekend i felt a little miss around 30 -45 mph when i get on the gas and let off it pauses or sputters a bit just enoff to make you mad. it feels like a baby version of the #6 missfire. i ran a motor vac on her and she seems to run and idle allot better . but i still have that little miss and cant seem to figure it out i need your help!!!.i dont know if it is the fuel filter or maby a cloged cat or maby a coil but the coils all test fine ? its such a little miss it will not set off the check light im stumped . its a 2000 f-150 4.6 100k and advice will be great

 

I had to change 3 on my old 2001 F150...all within 5000 miles of each other....mileage was around 85K at the time.

 

but could you really feel the miss? see this is such a little miss it cant posibaly be the coil. its someting stupid i just cant figure out.

 

Frigg around with the plug wires, clean inside the boots, add dielectric lube and reinstall. Last misfire I had, there was lots of moisture inside the bore where the plug sits, get engine hot, remove boots and moisture will evaportate by itself (mine's a '97, don't know if you have standard wires or c.o.p's.).