2.9L plug following.

[rdh]

1988 ranger 2.9 4x4. New wires,plugs car&roter. #6 cylinder keeps fouling the plug.Exhaust smells like fuel.Cold start will rungreat for about 3 min,then the plug fouls! Help anf thanks for any suggestions. Injector maybe?

 

[Earl43P]

http://www.fordfuelinjection.com/?p=82

Worth a shot. Could be sticking open.

 

[Psychopete]

check the fuel pressure regulator vacuum line for fuel

 

[Big Jim M]

Yep!

1988 ranger 2.9 4x4. New wires,plugs car&roter. #6 cylinder keeps fouling the plug.Exhaust smells like fuel.Cold start will rungreat for about 3 min,then the plug fouls! Help anf thanks for any suggestions. Injector maybe?

I'm thinking a compression check is in order.. If that cylinder is low, any other things you do won't work. So first find out if the compression is up to snuff.
Big JIm

 

[Vanner1993]

Probably a valve, that same crap happened to me but alot worse.

 

[90B24wd]

Change that spark plug! It could been damaged when you installed it. It happened to me. It drove me nuts for awhile.