2006 Explorer 4.6l misfire on 8

[Number4]

I'm looking to purchase an '06 Ex with the 4.6 that either needs timing guides or phasers.

That's the easy part.

It has a misfire on 8 which is what's scaring me. Is it a burnt valve? Does this occur on the 4.6 3v? I know it does on the Aviators in #8.
Or is it more likely the coil or plug.

The #8 issue would be the deal killer.

Any previous known issues for cylinder 8?

 

[94Eddie]

The spark plug well for cylinder #8 is susceptible to water being dumped into it from the cowl area. This can cause misfire issues. Check out this thread:

Any fix for water in spark plug wells 4.6L?

See my original thread http://www.explorerforum.com/forums/showthread.php?t=322777 I have read a lot about this issue. I have a 2008 w/ 4.6L. I (thought) I checked the wells this weekend. I took compressed air and a long screwdriver and circled around each plug/COP to loosen the dirt etc...

www.explorerforum.com

 

[Number4]

That would certainly be cool. According to MyCarFax, the dealer replaced the plugs at 95k and it now has 140k. Hoping it’s simple so all I have to do is the timing.

 

[boominXplorer]

Cam followers do go bad and tear up the camshaft and possibly drop a valve. Worst case scenario

 

[Number4]

Cam followers do go bad and tear up the camshaft and possibly drop a valve. Worst case scenario

Lady is going to let me take it home and check it out. Told her I’d buy it if #8 is a simple fix.
Showed up to get it but of course the battery is dead.