780rx7

I think I just answered my own question. The vaccuum hose route would clean the carb internals correct?

Kentetsu

No. Either dump it down the carb, or add to the gas tank...

djessence

Be careful is my advice.

boyee

iTrader: (3)

i just added a whole can os SeaFoam in my 1/4 full tank of gas. hope this helps me pass smog! after i'm finished with this tank, new spark plugs and oil change + filter on the. will post up later how my car does on the CA dyno smog test only station... wish me luck!

Jeezus

iTrader: (4)

SEAFOAM TIME

Clear day out. Added a can to the oil and went out for a 10 mile drive. Got home and added 1/2 a can through the vacuum line on the carb. Had the car revved to about 2500, and when my friend cut the car off I shoved the line into the can and "choked" the engine until it died. Now we play the waiting game...

Had to run inside and grab my camera, this cloud had dispersed quite a bit before I got a picture of it. Whole neighborhood must hate me now lol.

Jeezus

iTrader: (4)

Yes, that is my sunroof leaning against the house...

RipCityJB

Quick question from a non-technical person.....

If I add this to my oil on a well maintained GSL-SE with 129k miles, do I risk breaking up deposits that might actually be helping the seals maintain compression? Is it possible to do more harm than good? FYI: the car does smoke a little on start-up, so I figure oil is leaking into the chambers a bit....will this stuff help or hurt that problem?

Also... I did add to 1/8 tank of gas and drove it hard....didn't see any smoke...maybe fuel system was clean?

bliffle

You can probably get the same effect more gradually by adding 8-12 oz. of MMO to each fillup of gas, but it might take a few months. I did that with my dilapidated SE when I got it at 130k and now it's up to 160k and purrs like a kitten.

Kentetsu

It won't smoke when added to the gas tank, only when using direct injection. I don't think that running it through the tank will cause any harm, at least I never saw any downside in the use of it on my high mileage motor. Keeping the apex seals moving freely is the key to good compression. It is the carbon that will start limiting the travel of the apex seals.

PSYCOM

I've used it in the gas tank and great results. And on a regular carb... hell just pour it in and it'll clean it like rebuilding it. I've fixed a couple carbs that way.

Jeezus

iTrader: (4)

I never really noticed a difference when I poured the bottle in the tank with low fuel. I went through the carb today and I definitely noticed that it was smoother!

charlie1

So at what ratio do you apply to gas tank? The can says one ounce to the gallon, sounds like everyone puts alot more in.

ray green

iTrader: (14)

I like to pour it in the carb:

djessence

So when I was back home, i flooded my car trying to start it so i was like "wat the heck lets give this stuff a shot"

poured in down my primaries (a decent amount, didntknow how much to do"

Cranked for awhile before it caught and the most alarming amount of smoke came out my carb, my exhaust it was REDICULOUS.

but got the trick done.

takhay

I ♡ Seafoam

mazdaverx713b

iTrader: (91)

i've been using seafoam anually on all of my cars for around four years with only positive results. i like to seafoam an engine in the spring/early summer after the winter storage when i'm doing my yearly regime of 100% vehicle inspections(sans engine/diff/trans/steering box teardown).

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iTrader: (1)

sorry to revive an old thread, but i accidentally poured seafoam too quickly down my carb and as expected, it killed the engine (my friend was revving while i was pouring). i poured about half a bottle in and now my stock 85 gs won't start.

i also pulled the main fuel line to the carb and it seems that there isn't any fuel coming out while the fuel pump is on (car not started). are these two incidents related?

here is my checklist of things to check/replace:
1. any possible fuel line restrictions. i've already replaced the fuel filter.
2. spark plugs
3. oil
4. inspect fuel pump

am i missing anything? i'm a bit stumped and it's raining outside. any help is appreciated.

black82gsl

iTrader: (3)

I just started the car and had my buddy poor it down the carb while I kept it running. Picked my car up that was sitting since 98 and wouldn't even start and dumped that down it and it smoked like you wouldn't believe and ran great ever since!

ray green

iTrader: (14)

Flooding it with sea foam shouldn't cause any real problem, in fact putting a bunch in there and turning it over every few hours for a couple days is a great way to rejuvenate the engine. But now you need to get it out.

Certainly do all the routine maintenance (except the spark plugs, see below). Be sure that you are getting fuel WHILE THE CAR IS RUNNING (fuel pump won't run till the key is engaged). To do this put the fuel line end into a gallon jug and turn the engine over, if it's squirting fuel you should be fine.

To get the residual sea foam out pull the plugs, they should be all wet and black from the SF soaking. You will need to clean these up with a wire brush or wheel and air compressor.

Now with the plugs out turn the engine over for about 30 seconds, it should spin relatively easily, you should hear lots of swushing and a fine mist of SF will start to develop on the driver's side of the engine, that's your problem, you need to get rid of all that SF. Do this by letting it rest a minute or two to restore the battery (I usually have mine on the charger during these procedures) plus this will let the remaining SF flow down and collect on the apex seals.

Then give it another 20-30 second spin, you will probably see more mist but hopefully less this time. Keep repeating this procedure until you see NO MIST, then do it three or four more times to be sure you get all the SF out, even a little will foul your plugs on a cold engine.

Now reinstall your solvent cleaned plugs, and try to start the engine without giving it gas or choke. If it fires a bit then pull the choke out without giving it any gas and try to start, if it fires some more but still doesn't quite start give it a little gas while the engine is turning over, hopefully it will catch.

If at any point the engine quits firing or doesn't fire at all, your plugs probably have gotten fouled again (this is normal from even a small amount of SF). You will need to pull them, confirm the problem (wet plugs) and repeat the procedure.

Some folks recommend a tablespoon of transmission fluid or MMO into each primary at this point to help restore compression but I have only done this once (it worked). The problem here might be that too much oil might contribute to fouling your plugs again.

A little patience and effort and it will start.

Then prepare for this:



It will smoke for quite a while because some of the Sea Foam will have entered the exhaust system, this won't burn off until the pipes heat up sufficiently.

Kentetsu

Weird... I've never heard of an engine flooding due to Seafoam. In fact, I use it to deflood motors.

Did you disconnect a vacuum line or something when you removed the air cleaner?

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iTrader: (1)

Thanks for the help guys.

I pulled the main fuel line and it looks like I'm not getting any fuel to the carb. Key was engaged and I can hear the fuel pump pumping. Weird because it started OK before I put seafoam down the carb. I should get this resolved before doing what ray green said. BTW, when I squirt some carb cleaner in the engine, she starts up beautifully until all the carb cleaner is burned up - then she dies.

Besides a weak/malfunctioning fuel pump, is there anything else I can do aside from checking for restrictions before ordering a new one?

Thanks for helping out a noob.

Kentetsu

What year is your car? I believe it is 1983 and up that are not supposed to run the fuel pump unless it senses spark on the trailing coils. It could have been rewired at some point, but still...

Can you verify if you have spark on the trailing plugs? If you lost an ignitor, that could keep the pump from running. I know you said you could hear the pump, but is there any chance that you were mistaken? If the pump is not running, then you can also check the "Engine" fuse on the driver's kick panel. There is also a relay involved that can sometimes go bad, but I'd check the fuse first.

While you were under the hood, is there any chance that something was bumped? Maybe a plug got disconnected at the ignitor, a coil wire came off, etc. ? Maybe that distributor cap? I'm just throwing ideas at you...

Let me know.

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iTrader: (1)

Yes, ideas are good. Once i get back to my car, I can check all of these things. My car is a 1985 GS btw. My pump is pretty loud. Right when I turn the key, I can hear a rapid pulse-like vibration behind the driver's seat. I'll report back afterwards.

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iTrader: (1)

I meant to say, "when I squirt some carb cleaner in the CARB, she starts up beautifully..."

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iTrader: (1)

OK, I confirmed that my car is able to start with carb cleaner down the carb. She starts fine until the carb cleaner is burned up. She just doesn't get any fuel in the carb. I pulled the fuel line on the carb (per FSM) and also confirmed no fuel coming out. My fuel pump sounds normal. I'm guessing either there is an obstruction somewhere (couldn't check today because of the rain), or my pump is malfunctioning for some reason.

I know I'm getting off topic here...should I start a new thread instead?