Bronco33

With previous vehicles I have always just ran the seafoam through a vacuum line straight into the intake and it has always done a great job cleaning out the motor. Since the EB is GDI is there anything I need to be worried about using that same method???

acadianbob

What makes you think that you need to do this? Is there a problem? I'd leave well enough alone.

Centexguy

I wouldn't see why it would hurt anything. I run it through all of my vehicles and my four wheeler. I love the stuff.

greggebhardt

Why run seafoam if it is not needed?

Centexguy

How do you know it's not needed? And with as much as people worry about their vehicles on this forum, and all of the preventative stuff folks do, I'm surprised to see people being resistant to it.

mrpositraction

I've done it on all my vehicles that I keep for some time. I haven't done it to my truck yet, I usually buy a large can, pour 2/3 of it through the vacuum lines and the other 1/3 in the tank. I have seen incredible results with older cars that never had it done.

1_T_Scot

It might help to clean the intake Valves. In a non GDI engine the fuel has some cleaning effect on the intake in a GDI the back side of the intake never sees any fuel.

If you do it post your results. Take your intake manifold off take pictures or Intake valves then reinstall then seafoam then remove again should be good!!! LOL Just joking.

clubsfit

Good question, I was wanting to do the same thing, but didn't find a direct route vacuum line to do it. We need a DIY with pics for the Eco.

mrpositraction

The same line everyone is tying in for the boost gauge would work fine, easy to get to, though a small extension would work even better. I haven't checked the brake booster line, those are nice because they are so large you can do the final step and dump it in fast enough to kill the motor, then let her soak

I am installing a boost gauge later this week maybe I will pick up some seafoam and see how this motor likes it, though, I don't plan on getting much out, doesn't get run easy very long, I like my boost

Kit Sullivan

Not quite: All engines experience "reversion", where the fresh as well as the spent fuel mixture surges backward through the intake manifold due to pressure and vaccuum changes during the 4-stroke cycle. No way around it.
That is the main reason your throttle-body throttle blade will have the oily black residue on the backside of it after every 20K or so.

However, Seafoam is a good thing to run through an intake manifold vacuum source (try to pick a vacuum source as close the backside of the throttle blade as posible) every 10K or so for maintenance.