Fuel system decarbonizing

[mike100]

There used to be a product that came out in the 90's. Like BG44, but you pulled the fuse on the fuel pump and ran a can of detergent solvent/fuel on the fuel rail for a few minutes.

Nothing new here. Where this discussion should end up is how do you clean valve tops in a direct injected engine. No fuel or detergent outside of the combustion chamber- probably be some kind of water injection treatment that isn't too detrimental to catalysts or something. Audi's have had this problem for some time on their DI 2.0 liters.

[scottfab]

Originally Posted by PhillipsLT5

I de carbon mine every weekend with my right foot & permagrin

this is the correct way to de carbonize

[csavaglio]

I saw them do something similar...although I'm at work and can't look at the video... on Wheeler Dealers. They had a car having a tough time passing emissions and hooked up some kind of machine to the fuel rail to provide ionized fuel with the fuel pump disconnected. If I recall, there were several cycles run through it and there were pretty dramatic drops in the emissions numbers.

Not sure if I'd want to run that thing on an LT5, give the expense if it damaged it, so I'll add one more vote for the Italian tune up method of giving it a good WOT run here and there.

[John Boothby]

Originally Posted by PhillipsLT5

I de carbon mine every weekend with my right foot & permagrin

This is the way I do mine. Just thought this would bring out some interesting comments.

Pedal to the metal boys!!

Given the way most of us drive, and using premium gas, carbon buildup should not be a problem.

[John Boothby]

[QUOTE=csavaglio;199526]I saw them do something similar...although I'm at work and can't look at the video... on Wheeler Dealers. They had a car having a tough time passing emissions and hooked up some kind of machine to the fuel rail to provide ionized fuel with the fuel pump disconnected. If I recall, there were several cycles run through it and there were pretty dramatic drops in the emissions numbers.

That is where the vid came from. Big Ed from Wheeler Dealers.

[Schrade]

Originally Posted by mike100

just like any blown head gasket or intake leak- it's a big steam clean job.

You sayin' this is somethin' that should NOT be done there Mike?

Or that it CAN work if done right?

[mike100]

Originally Posted by Schrade

You sayin' this is somethin' that should NOT be done there Mike?

Or that it CAN work if done right?

No-I'm saying that water in an internal combustion environment is a hell of a good cleaner...if you've ever seen engine apart with a significant coolant intrusion, you would know what I was getting at. the trick is to meter the right amount in as a vapor so as not to lock the thing up.

like was said above- ATF and/or water has worked for years- just don't do the ATF thing on a car with catalytic converters that still work.

[Hog]

Originally Posted by John Boothby

Has anyone out there ever had their fuel system decarbonized?

I just saw a demo on TV regarding this. I guess it is a new proceedure that can be done in about an hour. It involves hooking up a machine to the fuel rail and running a highly refined fuel through the system under about 40psi.
The machine uses a "Nano-reactor" to atomize the fuel before it enters the fuel system. It also gives it a negative charge. The carbon has a positve charge so it attaches to the fuel molecules as it leaves the engine.

It kind of reminds me of the old quack medical machines of the past. That is why I ask the question.

GM dealerships do this as part of their injectir cleaning. There is a round canister that can be pressurized to fuel rail pressure with athe shop air. You pour top engine cleaner /gas mix intoi the "can" pressurize to rail pressure, disable fuel pump, depending on vehicle the fuel return line is disconnected.
The Top Engine CLeaner has changed formulations as per US EPA, Canada formulation is different.

[Hog]

Originally Posted by mike100

There used to be a product that came out in the 90's. Like BG44, but you pulled the fuse on the fuel pump and ran a can of detergent solvent/fuel on the fuel rail for a few minutes.

Nothing new here. Where this discussion should end up is how do you clean valve tops in a direct injected engine. No fuel or detergent outside of the combustion chamber- probably be some kind of water injection treatment that isn't too detrimental to catalysts or something. Audi's have had this problem for some time on their DI 2.0 liters.

I have seen Audi owners install meth injection. I was suprised how dirty the DI engines got.