seafoam
BF Veteran
Joined: Sep 2008
Posts: 2,522
From: Winnipeg, Manitoba
Hmmm, my pre cat has been out & no ill effects, but my 2002 isn't normal. The PCM has been tweaked beyond recognition, totally customized so I'm not sure.
Seafoam through the brake vacuum line should distribute it to all the cylinders. I have to check out what post Kyle said that because it sounds interesting & people should know, that's what the forum is about.
Seafoam through the brake vacuum line should distribute it to all the cylinders. I have to check out what post Kyle said that because it sounds interesting & people should know, that's what the forum is about.
Junior Member
Joined: Oct 2011
Posts: 337
From: Chicago, IL.
Seafoam, I put it in everything, boat motor, lawn tractor, snow blower, chain saw, ....
the stuff works as advertized. I don't have to drain the gas out at the change of seasons.
First ran across it when my buddies boat came out of 5 years of storage, fresh gas and seafoam and it would sound better the more it ran. been using, and recommending it for over ten years now.
the stuff works as advertized. I don't have to drain the gas out at the change of seasons.
First ran across it when my buddies boat came out of 5 years of storage, fresh gas and seafoam and it would sound better the more it ran. been using, and recommending it for over ten years now.
Senior Member
Joined: Sep 2008
Posts: 733
From: Snow Hill MD
HMMM! Seafoam can work... but have also seen cause sensor issues. Yes we have the carbon build problem on the 4.3s- but this has been happening in all small blocks since 1954! Simple fix(again from 1954) is Marvel oil! This product when added to fuel regularly lubes the total intake system and keeps this issue from occuring in the first place! Really! This is an amazing product! I have been using this for 35 years!
BF Veteran
Joined: Sep 2008
Posts: 2,522
From: Winnipeg, Manitoba
For carbon build up there is also this Does this make sense to remove carbon buildup? Piston knock [Archive] - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat which is found in https://blazerforum.com/forum/genera...on-slap-68262/
Super Member
Joined: Sep 2010
Posts: 1,485
From: Lynnwood WA
This is what i could find from Swartlkk when i did a quick search but i swear he said something along the lines of the brake booster line only feeds the rear two pistons, i just cant find it.
But heres this:
But heres this:
As far as the application of seafoam goes, here is the method I have used on the '96+ SCFI engines numerous times. Disconnect your MAF and IAT sensor. Remove the intake duct work from the air filter and from the throttle body. Dribble 2/3rds of the can down into the throttle body while keeping the engine running. With the last 1/3rd of the can, pour it in more quickly and allow the engine to stall (or shut it off). Let it soak in for 20-30 minutes and then run it like you stole it until the exhaust clears up. Then change your oil and plugs (or at least pull the plugs and check them - cleaning as necessary).