I just changed the plugs in my 04 f150(change them early they are a pure nightmare) and now my #7 is not firing. I have 115 psi compression, I have spark and I have fuel.?????????????Any suggestions
Dave

 

Check the wires. Just because you have spark doesn't mean the spark plug is 'fine'. It could be a faulty Spark Plug.

 

yes,i'd try to swap that plug with another hole and see if 7 fires

 

that was it. I had 2 bad plugs.you wouldn't think I would have 2 brand new plugs bad but I did. Thanks for the input.

 

I went and changed the rest of the plugs with motorcraft instead of the autolight and now I have a hesitation. Its not a skip but under a load it seems like its holding back and it kind of surges.?????
Thanks for the help

 

Sounds like a gas problem to me...Need more info.