How To Seafoam Your Car
if you baby your car and have leaky head gaskets or something, your engine could be absolutely filthy. i just wanna point out that usually cars that are babied more have more carbon deposits inside since they're never run hard enough to clean themselves out.
my car is just about to turn over 30,000 miles and i'm not gonna do it yet. i'd recommend seafoaming your gas tank and oil but don't do it through the vacuum line yet. when i get headers next summer and switch to NGK plugs and MSD wires, new O2 sensors...the whole shabang...THEN i'll seafoam right before that work is done. with 18,500 miles you probably don't have much carbon in the engine.
So would waiting on the brake booster line be helpful or should I just do it all at once?
So what is the car going to be like with that stuff in the gas. will I get smoke or is that mainly when I put it in the oil and brake booser?
but I had issues with it running VERY rich and fouling a plug already. I have already had to replace the cats since it was running so rich (caused by bad sensors and a failed PCM). Hoping this will clear out all of the crap in her from when she was running so bad before.Already did a treated tankful of gas and replaced the fuel filter (surprised how crappy the filter was). I'm actually doing it to help the oil as well since the car sits alot and I figure this should help clean out and prevent any sludge issues.
Only problem right now is I can't find the Deep Creep stuff around here. Any suggestions for other products instead?
Swapping out all 8 plugs with some new Delco Iridiums after treating. Will post back as to the (smoke) results on a low mileage car.
Allen
The Best V8 Stories One Small Block at Time

Check this out.... will help a bit.
http://www.installuniversity.com/ins...lacement_1.htm
Last edited by RMC_SS_LDO; Jul 30, 2006 at 07:14 PM.
Id say deff change oil and fuel filter but the plugs arent a major worry. Just sharing what happened with me and hope it can help out someone else. This was on a car with 97k on it and was the first Seafoam ever btw.
you're supposed to drive it pretty hard with a few WOT pulls, so i'd say in a matter of 2 or 3 minutes you should be okay...although i can't guarantee it. if you're driving around in the city and go traffic light to traffic light topping out at 30mph behind a line of cars...it's gonna take a lot longer.
I don't know if it made much of a difference, but it seemed to "smell" better and run a little stronger.Last phase is this up-coming weekend to jump on a plug swap, although I think I dorked up my new plugs by re-gapping them to .050 (Delco iridiums)
and I need to do the oil change.Only odd thing- I noticed last night the car doesn't want to idle when cold now
... today I checked the vacuum line again; disconnected it again to suck down any residual Seafom in the lines and re-connected to ensure it was secure with no leaks. Will run again to work to check.Any ideas as to why it would idle crappy in open-loop after Seafoam? I didn't dork with anything other than the vacuum line.
Last edited by RMC_SS_LDO; Aug 6, 2006 at 07:30 PM. Reason: Typo....

2.) your plugs are very dirty from the seafoam
3.) did you put seafoam in your oil? if you did, your oil may be a lot thicker than usual, making more effort to pump oil at idle.
may be any one of the three, or even a combination.
Thanks for the reply... I goofed in my post- it is crappy idle in OPEN loop in initial start, not closed loop.
I'll swap the plugs and oil (at about 100 miles now on the treated oil) this up-coming weekend.
Just hope I didn't trash my new plugs by re-setting the gap on them....
I can't see how I would have actually damaged them or why they would not work gapped at .055 vice .040. if not, it'll be the plugs...





