JCSXJ4.0

So I posted a few weeks ago about having trouble with white smoke coming out exhaust and a rough idle the day after I did the neon fuel injector swap. I did reinstall all the injectors as some on here suggested and then still had the same problem. THEN it dawned on me. I believe I put seafoam in the gas tank the night before. I bet that is my problem.

I took a look at the spark plugs, they look pretty charred and gunked up already (and I just changed them weeks ago).

So do you guys think that is the problem (white smoke out of exhaust and rough idle due to sea foam). You think I'm going to have to replace all spark plugs again? Anything else I should do?

Tbone289

It's not very likely. How much seafoam did you add to the tank, and how much gas was in there to mix with?

dcollins3208

I'm with Tbone... probably not

Just for reference (generally speaking):
Black smoke- Running rich
White Smoke- Coolant in combustion chamber
Blue Smoke- Oil in Combustion chamber

Are you SURE the white smoke isn't condensation from the first start up of the day/cold weather?

Tbone289

^ exactly what he said.

JCSXJ4.0

I put a whole can in with the tank almost empty then filled the tank up. The jeep ran great the day I did the injector change. Could tell a real difference. Well worth it. Then the next morning, had trouble starting. A lot of white smoke coming out tailpipe and very rough idle. Takes multiple tries to start the jeep as well. Just can't figure it out.

tech

Also white steam will come when cold . good combustion will produce water / steam . Does the white smoke go away ? it can be the sea foam cleaning out a lot of carbon .

JRusty15

If you ran the gas tank too low, you could have picked up some garbage from the bottom of the tank or maybe clogged a fuel filter. But in general, sea foam is combustable and I don't suspect it would cause an issue like this. Check your injectors and connections.

Tbone289

Sea foam wouldn't cause white smoke (steam) in a full tank of gas. It will only do that when it's put directly into the intake manifold. It's extremely concentrated when done that way.

Bugout4x4

There is one slim possible scenario where it might Tbone. Related to one of the jobs sea foam is supposed to be good for.

Tbone289

I'm assuming you're talking about water absorption. In that case, I would say that it's the water causing the steam, not the Seafoam.

I think you might be on to something there though, since he mentioned that he ran the tank nearly out...

Bugout4x4

Yep, that's what I was thinking, At some point it might have got water in the tank, the sea foam picked it up, and now it is burning off the water along with the sea foam and fuel. I seem to remember this happening quite a bit when we used it in boats. But like you say it's not the sea foam, but what the sea foam may have absorbed.

Bugout4x4

In reply to your edit... lol I didn't read it again but if he used a gas can to dump any in it the gas can could have been the culprit. It is a very common thing as you know to get water in gas cans.

Tbone289

Good thinking! That's the most likely scenario proposed so far. Hell, actually it's the only logical scenario proposed so far...

If that is what has happened here, I would say adding the Seafoam was a good idea, not a bad one.

Bugout4x4

Just read back and he did dump from a can. Every time I got water that's where it came from. lol Done it a lot too.

And I think all the gunk is varnish from the tank and lines.

Tbone289

You mean a gas can? I thought he was referring to the can of Seafoam. Yeah, I keep my cans sealed tight, and never put ethanol in a storage can if I can avoid it.