Which would be easier on the engine, 1 water decarbonizing or 6 lo-spd ita. tuneups?

[632 Regal]

I used to do this with the old carbureted engines with unbelievable results

[ryan roopnarine]

winfred sez that he uses the FPR vacuum line.

[AllanS]

Meaning that he disconnects the end that hooks up to the fuel regulator, and shoves it into water, letting the intake manifold vacuum do the rest, right?

[ryan roopnarine]

Meaning that he disconnects the end that hooks up to the fuel regulator, and shoves it into water, letting the intake manifold vacuum do the rest, right?

yeah, i would assume he regulates it by keeping his finger over the end of the hose. i was hoping it would run without the MAF inline, so that i could use a spray bottle at the throttle body (less chance of me hydrolocking things). but the car doesn't like that, so once i find where the hose connects, ill be doing things that way.

[winfred]

small diameter vacuum line and about 2k rpm help prevent any experaments in the non compressability of water

[632 Regal]

hydrolock is virtually impossible unless your idling at 300 rpms. In other words if it starts to die stop the water from flowing. Do not have it attached before you start it and make sure it doesnt siphon when you shut it off.

[winfred]

well i know that but i gotta add that like a disclamer "do not hook the garden hose to the intake of your car, some dammage can occure"

hydrolock is virtually impossible unless your idling at 300 rpms. In other words if it starts to die stop the water from flowing. Do not have it attached before you start it and make sure it doesnt siphon when you shut it off.

[ryan roopnarine]

decarbonization complete (or maybe round 1 if i find i didn't use enough) on 650 mL of water, i guess i didn't hydrolock :^). this will be the last i speak of this publicly on this board, as learned member bill r. has voiced objections to this procedure previously, and he does this for a living.

[632 Regal]

Bill R's objections to this. Do you have a link to it or can you enlighten me his thoughts?

[ryan roopnarine]

tim collins had asked bill if he could do this to his car using ventil sauber around 2001 or so. bill said he didn't like it because of the way the intake manifold was shaped in an I6, most of the fluid would get dumped into the 2 cylinders closest to the vacuum source (5 and 6) and starve them for oil while you are trying to keep the revs up. the rest of the cylinders would get very little cleaning chemical and very little benefit from it....he felt it was best to use the on rail cleaner or a gas tank cleaner that would be able to distribute solvent evenly. that's me paraphrazing what i remember his objections to be.....

results....somewhat disappointing

didn't do anything to get rid of my 21-2900 rpm ping. stry, it completely killed some ping i used to have at 4,000 rpm and tremendously cleaned up the smoothness of the powerband around that area. also, a unfortunate side effect for me is that when you engage the forced kickdown switch now, the car will go to about 6700 rpm now, as opposed to stopping at 6400 like it used to, which means i'll have to back off once i pass 6200 or so now. throttle feels crisper and engine is a wee bit quieter. i don't know if i didn't use enough water, or i didn't let it get sucked up fast enough (i went SLOOOOWWWWWW), but i guess it won't kill me to try with 1 or 2 more 600 mL doses and see if it does anything for my ping down low. i hope it gives me some gas mileage impt, but i can't really tell yet.