Hello, i recently had a 2000 Ranger 4.0L with 120k miles, last week i have cleaned the TB and IAC, there were well dirty, so it has to be the same thing in the engine, and apparently the seafoam should make lot of smoke, carbon or not, but there was none...

Heres how i did it.

1.Warm up the engine

2. Ask a friend to hold rpm to 2K and make sure it wont stall

3. Pour really Slowly about 1/3 of the bottle in the brake booster vacuum line.

4.Stop engine for 15 minutes, replug hose and add rest of can in fuel tank.

5.Start it and rev it up, no smoke or hesitation.

Did i do something wrong? Maybe i added the seafoam too slowly? Took me like more than 5 minutes to poor 1/3. Or too much RPM? Maybe i should add half the can next time?

(By the way, i didnt poored the sea foam directly in the hose, but in that thing between the brake booster and hose, maybe thats why the truck wanted to stall so easily?)

 

Mine only smoked the first time i did it at 85k miles after that i do it every 10k or so and it doesn't ever really smoke anymore. Im pretty sure it still works because its controlling the notorious 3.0 ping really well.

 

I tried again with half the can and poor it faster, this time it smoked, but not much and not more than 15 sec.

 

First time I did mine it barely smoked. Second time it smoked more.

I use 1/2 can in vacuum line, half in tank.

And I let it sit 30+ minutes. Longer the better. And more smoke. Lol.

 

Only waited 10 minutes, does it make that much difference?

 

Yes.