has anyone used seafoam fuel system cleaner? and if so what kind results did you get if any? i have heard this stuff works pretty well for cleaning everything from the tank to the valves.

iv used it in my camaro and my brothers honda and i love the stuff. in the camaro the difference wasn't that noticeable (but im always running fuel system cleaners though it so thats no big surprise. but with my brothers honda it gave it a whole new life. the car was alot more responsive and accelerated much better and it even got rid of a little knocking noise the engine made.

I have a 1986 Nissan 300zx otherwise known as the Z31. These engines came with what they call Injector knock, which is being able to HEAR the injectors pulsing fuel into the motor. Remember this.

My car had 100+k on the motor and a lifter tick when I bought it. I filled my tank about halfway, poured a full bottle of seafoam in the tank, then filled the rest of the tank with gas (Also added 1/3 of it to my oil (1 bottle in tank/ 1/3 of another bottle in oil). Some gas stations dont allow holding the gas nozzle while adding things to my tank...anyway...

I drove the car hard to use it as quickly as possible.

By the time I got home I heard NO LIFTER TICK, but this new, quicker ticking of some sort....BOOM, I got my stock injector sound back. The injectors were clogged BIG TIME, these things are louder than any lifter tick i have heard, but thats how these engines were made from Nissan.

This stuff does wonders for fuel system cleaning.

BE SURE TO CHANGE YOUR OIL AFTER PUTTING IT THROUGH YOUR OIL SYSTEM, it WILL break down the oil and turn it into a less weight oil..basically watering it down...but not literally with water. Dont drive more than a couple hundred miles with seafoam in the oil.

GREAT STUFF, JUST READ DIRECTIONS!!!! I cant tell you how many people use this wrong...its amazing.

thanks for the info gents, i think i will go ahead and use it befor rebuilding the rochester e4me

Also, if you are having the engine ingest it through the PCV or PB hose, DO NOT, I repeat, DO NOT LET THE ENGINE STALL OUT. You run the risk of hydrolocking the engine, as well as bending a rod or worse. Just let it sip just enough to keep the RPM's up.

After it sits, go out and 'cropdust' the neighborhood. It's kind of fun. Women, children, and small critters run like hell becuase your tailpipe produces an 'Uncle Buck' looking cloud.

I've used it for a few years, and love how much of a difference it makes.

Follow the directions to the letter, and you'll be surprised. The only vehicle I never noticed a difference on was my Colorado- but it only had 24k, all highway. And I run FI cleaner through every 5k or so.

Not trying to hijack the thread or anything, but how thoroughly does it clean the engine out? (via vacuum lines and gas tank)
Carbon build up?
Help compression loss?

And where do you get it? cant say ive seen it before

This stuff cleans the engine really good. I ran a can through my fuel tank and then I pulled the carb and the intake looked like new on the inside, hardly any carbon deposits. I have not dug deep into the engine to see how it dose but I think it does just as good. You can pick it up at walmart, advance, and autozone.

Seafoam is a fantastic product and does exactly what it says it will do. I run it thru my carb every 3 months.

AC Delco makes an equivalent product as well, part number 88861804.

Im gonna feel so dumb asking this but here it goes.....So if you got a carb do u slowly pour the seafoam into the carb? or do u just pour it in the gas tank? im assuming gas tank?

gas tank is probably better... you can technically pour it into the carb but would have to do it very very slow to prevent hydraulic lock, and with one hand on the throttle to prevent the engine stalling. better option is to use a vacuum line and suck it into the carb. dunno about other advantages or disadvantages.

I picked up a can of it at Autozone earlier, not bad at $9.
Whats the advantage to putting it in the vacuum lines along with pouring it in your gas tank?

If you've never seen a hydro lock on an engine, your not missing out cause it sucks!!! I was watching one of my buddies pour some water through his 69 camaro drag cars carb. He got a little carried away and we heard a hell of a backfire pop, pop and die, we noticed oil coming from under the car and found a wrist pin laying on the floor!!!
That was a big whoops and lots a money!!!

Through the tank will clean the fuel system.

To clean the valves specifically- I run it through the PCV or brake booster line- whichever one feeds all the cylinders (brake booster line on our FI cars/trucks) to get it directly on the valves.

You have to do it while the engine is at normal operating temp. Have it ingest about 1/3-1/2 a bottle this way, but DO NOT let the engine die. Let it sit for about 5 minutes (directions are on the can), and start it up and run around and cropdust the 'hood. It'll smoke like you blew the mother of all head gaskets. Makes a HUGE difference in idle quality and response.

It'll smoke a lot if you have a lot of carbon build up. My buddies 2001 P71 barely smoked, something along the lines of a slight cold day look. But my 1986 Z31 smoked like a blown motor.

Seafoam is a remedy, I prefer a preventative. I use an ounce of AMSOIL PI per 10 gallons of gas at every fill-up, with all my gasoline vehicles. The entire fuel system, induction, and combustion chambers stay clean all the time. If I get a used vehicle, the first dose is 6 oz per 10 gallons of gas (and usually a new fuel filter soon after).

I just bought some. Put a little more then a 1/4 can in the tank and about 2 minutes the car sounded different, in a good way. as the car was ideling for 5 minutes i was reading the can and it says can pour into oil and it will do stuff? so can pour it into my oil or should we not do that? dont want to make the wrong move

If you put it in the crankcase you will want to change your oil within 100 miles or so!! As Seafoam will breakdown your oil.

Damn nvm then i just switched my oil to royal purple lol. oh and if we are using a 350 crate should we use 10w-30? the guy at autozone said 5w-30 would work. just wondering?

i always like a heavier oil, 10w30 or 10w40 ...... i run mobil 1 15w50, but i got 14x,xxx on mine, and running that with lucas i never burn any oil, and run a good high oil PSI all the time, also no problems with a lifter leaking down or start up smoke (a gm favorite i call it pre start up lubercation)

i still running 5w20 in my honda, prob will switch to 5w30 at 50k on the clock

everything else gets 15w50 or 20w50 but thats do to it being hard run motors (look at VbGarage for other cars)

and back to the topic
Seafoam is worth its weight in gold, use it in any suggestion on the can with great results

why the crazy oil weights people? stick with 10w 30. that's what the cap says i just rolled over 145,000. runs great.

Seafoam is good if you use it right. If you have the carb trickle some down the carb or TB. Than take the vacuum line off the brake booster. Let the engine suck it in and do it until the can is about 3/4 empty and throw the rest down into the tank. Shut it off immediately and let it sit for 5 min. Than prepare for the smoke show of a lifetime.

Turn it on and let it idle for a minute. Tons of smoke is normal. Than prepare for weird looks. I always take it out on the highway as soon as i can to blow all that stuff out. Never rev the engine in park. Plus you get to look like you are spraying for mosquito.

Than run it until it smokes no more and a little bit longer. Than enjoy the smoother idle.

I run it through my carb and tank every so often. Ive never had a problem from it, but if it sounds like its going to die, I wait till the idle picks back up to poor again. You just haft to do it slowly. Ive stalled mine out before doing it and it was fine afterwards. It will smoke like a beast, lmao.

Well I picked some up yesterday too, poured about 1/4th of the can in through my brake booster vacuum line, didn't want to get carried away putting too much in there.
let it sit for 5 minutes, took it around the block and really didnt see much smoke at all, so all I can guess is that my engine isnt very dirty...
put the rest in the tank and I already feel a little better response. I say it was worth the $9 I paid.

Seafoam can go in crankcase, gas tank or directly into the injectors/carb, but the AC Delco cleaner can only go in the carb/vacuum lines.

I wouldnt let people scare you off with hydrolocking stories, as long as you pour it in slowly, just causing the idle to drop, you wont hyrdolock it. I have stalled my engine out a couple times and its still fine. I've probably done 8 seafoam treatments in 3 years, its the best preventative maintenance, and adding seafoam to a tank of gas is a good long term prevenative measure.