The following writeup is for getting the seafoam into both sides of the manifold evenly. It can be sucked through the brake booster line, but that will only clean one side.
3zc wrote:Well after reading through the hundreds of pages on seafoam, I figured i'd show people the best way i found (that others have said) on how to use seafoam the best way with out plenum, not using the break booster line, since that feeds primarily half the cylinders.(this was not my idea, I'm just making a write up with photo's on how to do it)
first I bought some (about 4 feet) washer fluid line, I think 3/8ths, but its pretty standard. I also bought some assorted "T" vacuum fittings.
I bought the seafoam too
total of about $8 or so.
now heres the best way i found worked well.
Make sure your engine is warm, run it for a while if not
run the lines your bought to each vacuum nipple under each throttle body, I'd say cut it at about the length it takes to reach about 3 inches past mid plenum (see pics) do this for both throttle bodies. Then run them into the T line and run the open T line nozzle with whatever line you have left over, that will feed from the seafoam (pics)I'f possible get a perpendicular T fitting, I made thre mistake of getting an angled one, and then made the mistake of orienting it poorly, but with a perpendicular T, both throttle bodies should get even fluid.
Once you have this set up like so, run the open ended hose into the seafoam, and run the engine, it will take a few minutes, (REV YOU ENGINE A LITTLE, I DID AT 3000 RPM) to suck up the fluid, but i used about half the can.
Then kill the engine , REATTACH your throttle body vacuum lines, and let the engine sit for 5-7 minutes.
Now, run your engine and let it run for at least 10 minutes, I did this then drove around (lightly) for about 10 more minutes. The smoke can get pretty bad.
Moderator Edit: Most sites/people recommend you drive your car hard, let the engine see all the RPM range for a short while after using seafoam, instead of driving around lightly.
