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I just did the Seafoam to my 98 4Runner, the oil treatment just follow the directions on the can, but as far as doing the carbon treatment through the vacume line, i used one that was on the intake or plenum? But be very careful you dont pour the whole thing in at once or put the hose in to suck it out, just dribble it in, Cuz if you do, liquid does not compress and you well blow a rod through your block. And the other thing is after i was done letting it sit for ten minutes then starting the engine white smoke pours out and when you drive it, it will be twice as bad for about 4-5 miles blowing all the carbon out. And fiinally my experiance after all said and done when i got on the gas it the engine pinged a bit had me worried but it went away and shes runnin good. So hope this helped a bit. Cheers
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98 4Runner Limited
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