just wanted to know what is the best vacuum line to do a fuel injection cleaner. I've ran in the past through the PCV line but didn't get many good results, as i have from other cars with a vacuum line that is nearer to the throttle body and actually cleans the whole intake manifold. I'm leaning towards just spraying it inside the open TB as its running. Motor by the way is a 2.8, and I'm using Seafoam. thanks in advance.

Best results is to spray in the throtle body. I spray in the throtle body first with the engine not running and then let it sit for 10 minutes, then start the car. The throtle body is the main part to get clean.
Don

alrighty goes down tomarrow, much appreciated.

how did you spray it into the throttle body. I found it pretty awkward to try that.

No problem if you remove the air clearner tube.
Don

when i did it, i ran it throught the vac. line in the upper plenum, i just attached vac line to it, and dropped the vac line in a bottle of sea foam revved the snot out of it, smoked like a bit<h, then i let it die while sucking, (that leaves sea-foam on top of the pistons, let it sit for like 30 min. then fired it up it took a little to start, but then it smoked real bad for a min or 2 then i ran the rest of the can throught while reving the motor just enough to keep it running, then i replaced the spark plugs (ngk ur5 gapped at .045 )

it ran MUCH better afterwords!!!!

as an alternative to seafoam,,..... GM also sells a top end cleaner guys on Club GP talk about it alot, im suprized nobody has brought up that product here on PFF before,

ive also Done the same procedure with ATF dex III instead of Seafoam with the same results

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Rich AIM: ONE FAST 2M8:
98 Black GTP 2 Dr
86se V6
Gold 86se 355 SBC,
92 BMW 325i

The vac line on the right side of the plenum? Like the one with the right angle?

30 minutes???? seafoam recommends 5 minutes if i am not mistaken.

i had a pic, but forgot to post it, it is the one after the TB that is going into the middle of the plennum, i left it sit for 30 min on a hot engine with thoughts of it eating more crap off the valves and pistons

i like ka4nkf method.
remember this is not an injector cleaning. it cleans the intake of carbon deposits.
run cleaner ringht into the fuel rail under pressure with the pump turned off to clean the injectors.
i use top engine clean (gm) alot. it works maybe the best of what i have used. i use it in the fuel rail though, never thought of running it down the intake.
gms method -2 oz cleaner mixed with 30 oz fuel. do it twice. this is used for some warranty fixes.

any info on the product used?

if you are asking about the top engine clean,

the can i have in my hand is #1050002 (7digits . . . must have been around a while)
quart can means eight treatments.
$9.20 customer price.

one bulletin said to pour some in through the sparkplug holes and set overnight. that supposedly took the carbon off of the top of the pistons and stopped cold start knock on the new ls1 family v8. it did work for a while, but i wonder if it had more to do with carbon around the rings.?

GM PART # 1050002
CATEGORY: Vehicle Care
GM LIST: $6.74
OUR PRICE: $3.37

www.gmpartsdirect.com
too bad they rape ya on shipping

my local dealer gets me stuff for the same cost though

[This message has been edited by $Rich$ (edited 01-27-2005).]

seafoam can not be poured into the throttle body, it comes right back out. I also tried to spray it by taking a sprayer off of a windex bottle (sprayer empty of course) and used that to spray it in with the throttle plate fully open. still came right out. I could see how it would work on the duke or other throttle body injected motors because of gravity, but there is an upward slope in the top intake manifold right after the throttle body. $RICH$ do you think you could find that picture of that vac. line?

I use carb cleaner from Auto Zone $99 cents per can. I usually spray two cans.
Don

ya here it is, i was at work before so i couldnt post it

hell.... you could even just pull that hose off and stick the long red tube from a spray can in there about into the middle of the air flow and spray it, then it would get evenly distribuited to all the cylendars with the air flow

Be careful with those long red tubes, they have been known to blow off and then you are in trouble.
Don

well, hopfully one would be smart enough to hold on to it

I found out the hard way and now I super glue my red tube to the spray head. sometimes trying to hold on to it can be a problem in close places.
Don

alrighty goes down tomarrow, this time for sure. thanks

quote Originally posted by ka4nkf: I found out the hard way and now I super glue my red tube to the spray head. sometimes trying to hold on to it can be a problem in close places. Don

Me too. Super glue sounds like an excellent solution.
I was cleaning my 3.4 DOHC intake plenum the other day with some intake cleaner and I saw the tube shot off. Looked like it went through the brake booster vacuum port. If you're not familiar with the inside of the 3.4 plenum.. well, its like 6 snail shells with a tube connecting them on the end. You can't see all the way through it because of the 90 degree bend. After flushing water and degreasers through the intake for fifteen or twenty minutes then looking through every hole in the darn the thing with a flashlight for another half hour (not exaggerating on these figures!) looking for the straw, my girlfriend showed up. I explained what had happened and what I was doing and she said "was it a black straw?".... and picked it up out of the ground cover near where I was working. Oui.

Keep in mind you're probably not just going to be breaking down carbon but also washing all the oil out of the vacuum ports and intake runners... and into the cylinders. You may want to repeat the procedure so you can get rid of all the residue from that oil burning up or sitting around while you let the stuff soak.

-Steven

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I just thought up another idea. pull the pcv valve out of the cover and place it in a small container of carb cleaner and start the engine. I don't know if this will work but it sounds good.
Don