#6 plug wet

[Ranger Phil]

#6 plug seems to be fouled with oil. Engine smokes bad. replace plug and it stops for about 100 miles then it starts again. have replaced the head
(used) and it still does it. replaced coil, dist. cap and button, and wires with no change. compression is 170. questioning the ICM. any help will be gratefully accepted!!
Phil

 

[graff104]

Whats the compression on the other cylinders?

 

[Ranger Phil]

150 is lowest 170 is highest

 

[krustyguitar]

check for leaky injector on that cyl

 

[Ranger Phil]

the injectors seem fine. they are all clicking while running and ohmed out at 15.3 to 15.6.

 

[shadetree]

If it smokes constantly, it is probably a broken ring. Oil is coming from the crankcase not the ICM. You replaced the head, so that eliminates valve guides/seals.shady

 

[betomonroy]

No doubt... its either a broken ring or an oil leak through the head gasket due to an uneven surface.