It sure sounds like spark problem. I could be wrong. What kind of coil pack did you get? Did it change anything at all. I have gotten them bad out of the box. Chinese stuff
Hooked up my timing gun and it is firing on that cylinder. I bought a borg warner coil pack. I changed the spark plug to a new one. I pulled it again after running it for a few minutes and there was oil on it.
I would say the intake. Ford's wisdom made plastic intake manifolds for the 4.0L. Is it the over head cam or over head valve? OHC motors also wear out the cam chains.
I tried the wd-40 deal also and no change at all again.
The exhaust has a very weird smell to it. Nothing like I have ever smelled before. It was also very white like a blown head gasket, but I dont see any water in the oil and the plug appeared to be dry with the exception of oil.
She wants to have it towed to a stealership. It sucks because we dont have a spare vehicle so we are going to have to make due with one truck right now.