You've been doing it wrong. Seafoam injection port
- Thread starter KU_MechE
- Start date
doing it this weekend
jgue467
Senior Member
Do the engine oil too, so it'll All be clean - Luck! :cowboy:
Hesk11dog
New member
I just changed oil last week so I am going to wait till right before next change to add to the oil. ran it through the throttle body last night, man that stuff is scary. Improved the miss-fire but did not fix it completely. Going to have to check injectors tonight
SnowLizard
New member
Had my 99 for about a month now, been researching and wanted to bump this great thread...
been getting low MPG's so this might help with it all especially after replacing MAF and cleaning TB. I plan on doing the gas tank, some in oil for longer driving, and intake vacuum.
I'll see if there's any improvement in my t4r @ 153k miles.
been getting low MPG's so this might help with it all especially after replacing MAF and cleaning TB. I plan on doing the gas tank, some in oil for longer driving, and intake vacuum.
I'll see if there's any improvement in my t4r @ 153k miles.
Have you tried replacing the o2 sensor? Probably a more likely culprit, seafoam won't likely get you better MPG's.
I have used the spray version for fogging intakes through a vacuum line before, that version of seafoam is called "Deep Creep". It's a little easier to control how much you are adding versus the liquid version. Both work well, and be prepared for a knight rider smoke screen coming out of your exhaust afterwards as it burns through. Totally normal. For inline 4-cyl's I like to pour some on the top of the pistons if they are really carboned up and let it soak overnight with the plugs out. In the morning pull the MPI fuse and turn it over a couple times, it'll spray all the crud out the spark plug holes. Did this on my old turbo DSM and it dropped the compression ~20psi across all 4 cylinders because of the amount of carbon I got out. (was 180 before, ~160psi static afterwards) I usually just pour some in the gas tank a few times a year to help keep the injectors clean now though.
SnowLizard
New member
I am planning O2 sensors as well, I just got the part numbers for my 3.4... but can't tell without looking if I have the Cali emission truck or not... it was a cali car for its life, so I'm thinking it is.
Easiest way to seafoam is they make a can with a long bent straw on it that hooks to the TB and the intake goes over it to seal it. Sprays it right before the throttle body so it gives a nice even distribution of stuff. Of course you have to hold the throttle open but that's easy enough.
stever1000
New member
Would this method negate cleaning the throttle body as well? Or would it be best to seafoam, then clean throttle body afterward to check for any leftover gunk?
Ghostsauce360
New member
I've always done the booster, good to know!
ghettoflow21
New member
So wanting to do Seafoam on my car along with BG44K treatment. For some info, it has 280K miles, single owner, religiously changed oil every 5K miles. I also plan on changing the oil after doing the BG44K treatment.
What order should I do these and is there any concern with doing this on a car this old?
What order should I do these and is there any concern with doing this on a car this old?
ghettoflow21
New member
Bump, anyone got any comment? Would this cause any issues? I'm thinking BG44K, drive the tank down, do Seafoam, then an oil change. Thoughts?
Hi, can someone please help on where to i put the seafoam on my rav4 2002 with 1AZ-FE 2.0 engine, i use to put it on brake booster vacuum line until i got this thread. thanks. showing me a diagram where to put the seafom to let is saok to my 4 cylinders will be appreciated.3RZ 2.7l OWNERS:
DO HALF OF THE TREATMENT USING THE BRAKE BOOSTER LINE ON THE INTAKE MANIFOLD. Then, if you look on the other side of the intake manifold, you'll see another vacuum line on the opposite side. Use this to finish off the last two cylinders.
Works well and thoroughly for me, and I don't give a damn if you say otherwise.
Piney
New member
Holey Moley!
Clouds of smoke? Liquifying gunk?
All seems a bit rapid to me. Terrifying even.
I've used seafoam since I bought my first vehicle in the early 1970s. I put some in the gas once in a while and like to believe gentle, regular (sort of) use keeps things okay. I've always been afraid of instant solutions that might cause loads of crud to let go in a hurry.
But then, I'm not above running some atf in the oil once in a while for 100 miles or so. Or seafoam.
Or using the seafoam spray at the intake end once in a blue moon.
Generally, a half bottle in the gas, repeat. Wait a tank, do over and wait a tank and then a full bottle in a tank is as harsh as I go.
I reserve that circus for 'new to me' rides.
Usually it's just a half bottle twice a year.
Seems to work.
Clouds of smoke? Liquifying gunk?
All seems a bit rapid to me. Terrifying even.
I've used seafoam since I bought my first vehicle in the early 1970s. I put some in the gas once in a while and like to believe gentle, regular (sort of) use keeps things okay. I've always been afraid of instant solutions that might cause loads of crud to let go in a hurry.
But then, I'm not above running some atf in the oil once in a while for 100 miles or so. Or seafoam.
Or using the seafoam spray at the intake end once in a blue moon.
Generally, a half bottle in the gas, repeat. Wait a tank, do over and wait a tank and then a full bottle in a tank is as harsh as I go.
I reserve that circus for 'new to me' rides.
Usually it's just a half bottle twice a year.
Seems to work.
TonyB66
New member
Instead of starting a new thread, NAPA has a really good price on the spray version with the TB wand.
https://www.napaonline.com/en/p/SF_SS14
I just ordered a couple online and will pick-up this evening...
I Seafoamed my 3rd gen shortly after I purchased it: fuel, oil and vacuum. I however don't remember if I introduced it before the TB. I use this stuff in our other vehicles too, so I'm not sure.
Either way, great price at NAPA, for those interested.
Here's Timmy showing how:
https://www.youtube.com/watch?v=J5BvNwyIqmY
https://www.napaonline.com/en/p/SF_SS14
I just ordered a couple online and will pick-up this evening...
I Seafoamed my 3rd gen shortly after I purchased it: fuel, oil and vacuum. I however don't remember if I introduced it before the TB. I use this stuff in our other vehicles too, so I'm not sure.
Either way, great price at NAPA, for those interested.
Here's Timmy showing how:
https://www.youtube.com/watch?v=J5BvNwyIqmY
Last edited:
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