SeaFoam treatment made things worse! - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 1 Week Ago
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SeaFoam treatment made things worse!

Hello all. Yeah I sprayed 3/4 of a can of SeaFoam into the intake manifold, using the vacuum line from the brake booster. Now, the thing runs rougher at idle, and stumbles sometimes when cold, when throttle is applied below 2000rpm. Has lousy/uneven power below 2000rpms too. Especially before the engine warms up completely. Any ideas? Been that way for a couple weeks now. How could squirting SeaFoam make things worse?
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What engine and what Year Ranger??

And why would you spray Seafoam into the engine?

Did you just read about doing this or was there a specific reason you did it, i.e. an engine running issue?


General speaking you would do this AFTER repairing a Rich Running issue, to clean off carbon deposits, so injector or computer issue was FIXED and now you want to clean off build up that has accumulated over the last year or 2 of this problem

If you clean off carbon deposits this way then you DO need to pull out the spark plugs afterwards and clean them, because they can get shorted out and even get damaged by this method

Last edited by RonD; 1 Week Ago at 05:00 PM.
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Did you use the actual aerosol can or the old style and pour it in the vaccum line? And what was the exact procedure you used? Did you let it hot soak for 15 minutes then drive it aggressive for 20 or so minutes? Ive used the spray through the throttle body many times on many different engines with no issue whatsoever when following the correct procedure. When pouring it in a vacuum line with the regular can its way too easy to over do it. I would definitely pull your plugs and check them. Like ron said you most likely fouled the plugs.
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Quote:
Originally Posted by Apexkeeper View Post
Did you use the actual aerosol can or the old style and pour it in the vaccum line? And what was the exact procedure you used? Did you let it hot soak for 15 minutes then drive it aggressive for 20 or so minutes? Ive used the spray through the throttle body many times on many different engines with no issue whatsoever when following the correct procedure. When pouring it in a vacuum line with the regular can its way too easy to over do it. I would definitely pull your plugs and check them. Like ron said you most likely fouled the plugs.
100% agreed - ive done it several times to vehicles including directly down the carb on old stuff. Never had issues. if using a vacuum line it goes quick and i usually let it slurp, stumble, clear, then repeat till 1/2 the can is gone. Then shut it off and let it soak for 10 min then drive the **** outa it.
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Dngr Rngr knows whats up! Seafoam is great stuff. My issue with using the brake booster line, sprayed or poured in is that its entering the back of the intake. Its not going to flow evenly through all the runners. Its going to always be heavy on the rear cylinders. Going through the throttle body insures an even distribution. It actually even says that on the spray can. BUT ive done the pour method many times also with zero issue WHEN DONE RIGHT. The aersol can didn't always exist lol. Plus I do it on my lawnmowers, tractors, etc. No way to really spray those. Ill still put money on the plugs being fouled up. And ill even bet the rear plug(s) are the effed up ones.
​​​​
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Originally Posted by Apexkeeper View Post
Dngr Rngr knows whats up! Seafoam is great stuff. My issue with using the brake booster line, sprayed or poured in is that its entering the back of the intake. Its not going to flow evenly through all the runners. Its going to always be heavy on the rear cylinders. Going through the throttle body insures an even distribution. It actually even says that on the spray can. BUT ive done the pour method many times also with zero issue WHEN DONE RIGHT. The aersol can didn't always exist lol. Plus I do it on my lawnmowers, tractors, etc. No way to really spray those. Ill still put money on the plugs being fouled up. And ill even bet the rear plug(s) are the effed up ones.
​​​​
Cool thank you I'll check the plugs. I'll bet that's it that would explain the symptoms. I'll report back here and tell the story on the spark plugs. After I did the seafoam treatment I did take the truck out for some vigorous driving, and high-speed running (shitfted at 5k several times once it was warmed up). I didn't let it soak more that a few minutes after the Seafoam treatment though. And yeah it was the spray can version not the liquid-at-atmospheric-pressure version. I got the technique from a YouTube video. I will link the video if anyone's really that curious.

In terms of what engine I have, sorry I forgot to mention that. It's the incredibly anemic 3.0L V6. Feels very 1980's in terms of it's power delivery, and fuel economy. I wish the tooth fairy would bring me the 4.0L V6 and swap it out for me

Speaking of the spark plugs, I have one spark plug wire that likes to keep popping off. Is there a simple way to make them stay connected to the spark plug better? When I push it back onto the spark plug it seems to be just as tight as any other spark plug wire I've plugged onto a spark plug.
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Quote:
Originally Posted by Apexkeeper View Post
Dngr Rngr knows whats up! Seafoam is great stuff. My issue with using the brake booster line, sprayed or poured in is that its entering the back of the intake. Its not going to flow evenly through all the runners. Its going to always be heavy on the rear cylinders. Going through the throttle body insures an even distribution. It actually even says that on the spray can. BUT ive done the pour method many times also with zero issue WHEN DONE RIGHT. The aersol can didn't always exist lol. Plus I do it on my lawnmowers, tractors, etc. No way to really spray those. Ill still put money on the plugs being fouled up. And ill even bet the rear plug(s) are the effed up ones.
​​​​
Well crap. I inspected the spark plugs last night, and they were all in perfect shape actually. All of them had mostly no deposits at all, with just a very slight golden brown haze. I'd like to see them a little more golden brown actually. But no carbon deposits or fouled plugs at all. The gaps were all too narrow so I widened them to the spec written on the sticker above the radiator in the engine bay. No change though. Truck still runs kind of rough just like it did before. Any more ideas?
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There's no check engine light? Any access to a scanner that can read mode 6 data?
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There's no check engine light? Any access to a scanner that can read mode 6 data?
No check engine lights. No idea what mode 6 data is, but no I don't think I would have access to that kind of device anyway.
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  #10  
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Try assuming that the vacuum line and/or the plastic inlet into the brake booster was damaged when you removed the vacuum line.
Temporarily pull the line off again and block the port off at the back of the upper intake manifold and see if that doesn't fix things.
Be warned, you won't have any power brakes of course.
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