5.4 3v seafoam with no smoke???? Truck had 80 k now has 83! What gives???

 

Your either clean or you didn't use 1/3 of the can as recommended. You also have to let it sit for about 10 min or more. Then when you go to start it up, it should rough idle for a brief second, then put it into neutral and rev till you see smoke..

If you tried the booster method already, then give seafoam deep creep a shot through the throttle body. It comes with a very long straw now so you won't have to worry about spraying all over your MAF. I usually have my best results with the throttle body method over the brake booster method on my truck..

 

Don't worry. I didn't have smoke either. I went with 1/2 can in the booster, 1/2 can in the oil, and full can in the gas. No smoke. I don't think its a big deal if you don't get smoke. I was expecting to smoke up the whole neighborhood but got nothing. But like said above, you gotta let it sit for a bit after you put it in the booster