black smoke

[firstford]

My coworker has same 5.8 351w engine in a f150 says black smoke comes out when he cranks it said when he check plugs tips were black what could that be beside idle air control.

 

[Seabronc]

I don't know what year and engine you have, but black smoke and plugs is most definitely caused from running too rich. A few more details might help with more specific suggestions.

Good luck,

>-

 

[firstford]

I don't know what year and engine you have, but black smoke and plugs is most definitely caused from running too rich. A few more details might help with more specific suggestions.
Good luck,

>-

1990 f150 5.8 slight miss you hear a high volume of air coming from breather and black smoke.

 

[bidibronco]

Sounds to me to be bad valve seals wich will lead to oil getting into the combustion chamber thus making black smoke.

 

[bigtrux]

a faulty fuel pressure regulator can cause engine to run to rich. but if black smoke is only at start up or when u stop and take off again i'd go with bad valve seals....

 

[Mike @ Tracy]

I thought black smoke was fuel rich and bluish smoke was oil, Black dry plugs are carbon fouled, black wet plugs were oil fouled. The same reason semi's roll black smoke taking off from stop signs, the turbo's arent spooled up so they are running rich. Sounds to me like you're friends truck is loading up at idle.

 

[firstford]

The plugs are black wet with a gas smell.

 

[Yardape]

Sound like hes flooding, what year is the engine?

 

[Yardape]

K never mind found it, the fuel pressure regulator could be screwed

 

[firstford]

changed regulator & plugs let truck run about 3 min check plugs they were black again.