3.1 lho v6 seafoam,,, no smoke??

[Kipp]

I've got a 93 lumina base model with the 3.1 in it. Been running a bit rough at idle when at normal temps. So I decided to use some seafoam after a good drive and see what kind of results I would get. I poured a little more than 1/3 of the can into a container, and let it get sucked into the brake booster line that connects to the upper plenum.

When I first started the car (before using the seafoam) it was running awful with the brake booster line off, then as I went to pour the seafoam through it started revving itself to around 2k rmps. I continued to pour for about a good 45 seconds. The car started stumbling and right before it was about to stall I shut it off and let it sit for 30 minutes.

Connected the brake booster line and started the car, a small bit of smoke shot out for a split second then stopped. And never continued smoking after that.

Did I do something wrong here? I did some reading before I did it to get an idea on how to do it. I feel like it shouldve been smoking like crazy since the car has 242k

Also if it helps,, I put the rest of it in a half tank of gas

[Superdave]

it should have smoked a little, did you rev it up at all or just let it idle?


How is it running now?

[robertisaar]

i've never gotten a large amount of smoke out of any car i seafoam.... then again, i'd like to think it's due to me keeping an internally clean engine.

[Kipp]

it should have smoked a little, did you rev it up at all or just let it idle?


How is it running now?

i let it idle for about 15 seconds waiting for something to come out, and when nothing did thats when i decided to rev it a little. about 3-4k. and even then i got nothing.

honestly i want to say it has more response from a stop, but then again that could be just me hoping for the best lol. still has a rough idle.

[Kipp]

i've never gotten a large amount of smoke out of any car i seafoam.... then again, i'd like to think it's due to me keeping an internally clean engine.

well now that i think about it, when i replaced the head gaskets on the car, the shop that i took the heads to be milled at cleaned the valve faces and the area around them. and i cleaned the tops of the cylinders while i was down there.