Additives

[ka0sx]

chevron techron gas only contains 1oz of techron for 55000 gallons of gasoline might as well not be there. however if you want to clean up your engine something fierce, I recommend using the whole 12oz in your tank, it wont hurt your engine.

there is also a cleaner that will clean out your entire engine of carbon buildup better then techron or any of the popular brand cleaners, was designed to be clean for marine use, cant remember the name at the moment. It requires some knowhow though, You put it into the engine directly through a vacuumme line at about 3k rpm then when it drains the can you instantly shot of the engine and let it sit for about 30 - 60 minutes.
after this you are good to restart the engine, there will be lots of white smoke, dont worry your engine is fine it is just the product and carbon buildup exiting out the exhaust. After the procedure change your oil withing the next 100 miles.
once again this is the most intense and best method to get rid of the carbon buildup in the engine, but I wouldnt recomend it for any car with less then 150k miles on it, unless your car has been running rich and you are now failing smog for high NOx

[1stToyota]

Originally Posted by ka0sx

chevron techron gas only contains 1oz of techron for 55000 gallons of gasoline might as well not be there. however if you want to clean up your engine something fierce, I recommend using the whole 12oz in your tank, it wont hurt your engine.

there is also a cleaner that will clean out your entire engine of carbon buildup better then techron or any of the popular brand cleaners, was designed to be clean for marine use, cant remember the name at the moment. It requires some knowhow though, You put it into the engine directly through a vacuumme line at about 3k rpm then when it drains the can you instantly shot of the engine and let it sit for about 30 - 60 minutes.
after this you are good to restart the engine, there will be lots of white smoke, dont worry your engine is fine it is just the product and carbon buildup exiting out the exhaust. After the procedure change your oil withing the next 100 miles.
once again this is the most intense and best method to get rid of the carbon buildup in the engine, but I wouldnt recomend it for any car with less then 150k miles on it, unless your car has been running rich and you are now failing smog for high NOx

Seafoam...

[ka0sx]

Originally Posted by 1stToyota

Seafoam...

that was it =P
thankyou.

[YarisSedan]

Originally Posted by ka0sx

chevron techron gas only contains 1oz of techron for 55000 gallons of gasoline might as well not be there. however if you want to clean up your engine something fierce, I recommend using the whole 12oz in your tank, it wont hurt your engine.

there is also a cleaner that will clean out your entire engine of carbon buildup better then techron or any of the popular brand cleaners, was designed to be clean for marine use, cant remember the name at the moment. It requires some knowhow though, You put it into the engine directly through a vacuumme line at about 3k rpm then when it drains the can you instantly shot of the engine and let it sit for about 30 - 60 minutes.
after this you are good to restart the engine, there will be lots of white smoke, dont worry your engine is fine it is just the product and carbon buildup exiting out the exhaust. After the procedure change your oil withing the next 100 miles.
once again this is the most intense and best method to get rid of the carbon buildup in the engine, but I wouldnt recomend it for any car with less then 150k miles on it, unless your car has been running rich and you are now failing smog for high NOx

I think what you are thinking about is seafoam. My auto shop sells those services for 60 dollars. I can tell it makes a massive difference before and after. Also you can simply add a can to your tank of gas and it will clean the injectors and pistons still. I put one in a friends car and the exhaust started to smoke after a few minutes from the carbon being removed.

I would reccomend doing that service every 30k miles. To keep your engine running clean as possible. I have noticed every time the car has very minimal amount of smoke i ask them what kind of gas they use. They always say chevron. One car had 180k miles and there was no smoke. Well just one baby puff. One car with 30k miles who ran only cosco gas the car stalled out so many times from the massive amount of carbon the smoke traveled out past our shop into the street and nearly caused a pileup as it was so dense. We had to drive it around the local neighborhood trying to to get it to clear up but it was smoking for atleast 15 minutes. When we got it back to the shop we had to let it idle for a hour before it stopped smoking. I have never seen anything like it in my life. Since then i made it my mission to advise all my customers to stay away from discount gasoline. ANd belive me this customer after witnessing himself the effects will never use it too. Man did that car run smooth afterwards though. Idle went perfect the car had a lot more pep.

[Yaris Hilton]

Originally Posted by ka0sx

there is also a cleaner that will clean out your entire engine of carbon buildup better then techron or any of the popular brand cleaners, was designed to be clean for marine use, cant remember the name at the moment. It requires some knowhow though, You put it into the engine directly through a vacuumme line at about 3k rpm then when it drains the can you instantly shot of the engine and let it sit for about 30 - 60 minutes.
after this you are good to restart the engine, there will be lots of white smoke, dont worry your engine is fine it is just the product and carbon buildup exiting out the exhaust. After the procedure change your oil withing the next 100 miles.
once again this is the most intense and best method to get rid of the carbon buildup in the engine, but I wouldnt recomend it for any car with less then 150k miles on it, unless your car has been running rich and you are now failing smog for high NOx

Nothing new about that, it's a real throwback. Those carbon cleaning solvents, under numerous brand names, were popular in the old days before emission controls. Usual advice was to remove the air cleaner and pour it straight in while holding the throttle open to rev the engine, pouring the last bit in fast enough to kill the engine. After letting the warm engine sit with this stuff in it for a few minutes, you restarted the engine, revved it with the smoking, misfiring and backfiring till it smoothed out enough to drive, then took it out on the road to progressively run it up faster till it started missing, hold it till it smoothed out, then gun it up some more. Then you immediately changed the oil and the spark plugs, as the oil would be diluted with solvent and the plugs would have all kinds of gunk on them from the deposits loosened in the combustion chamber. Following that procedure will quickly overheat a catalytic converter and will set error codes in an ECU, and would not generally be recommended for modern cars. But it sure will get a lot of carbon buildup out of combustion chambers.

[dallas]

Your thinking of Seafoam.

Originally Posted by Yaris Hilton

Nothing new about that, it's a real throwback. Those carbon cleaning solvents, under numerous brand names, were popular in the old days before emission controls. Usual advice was to remove the air cleaner and pour it straight in while holding the throttle open to rev the engine, pouring the last bit in fast enough to kill the engine. After letting the warm engine sit with this stuff in it for a few minutes, you restarted the engine, revved it with the smoking, misfiring and backfiring till it smoothed out enough to drive, then took it out on the road to progressively run it up faster till it started missing, hold it till it smoothed out, then gun it up some more. Then you immediately changed the oil and the spark plugs, as the oil would be diluted with solvent and the plugs would have all kinds of gunk on them from the deposits loosened in the combustion chamber. Following that procedure will quickly overheat a catalytic converter and will set error codes in an ECU, and would not generally be recommended for modern cars. But it sure will get a lot of carbon buildup out of combustion chambers.

[Yaris Hilton]

Not exactly. I'm saying that Seafoam sounds just like the old common carbon cleaners.

I've been doing some Googling on topics related to intake valve and combustion chamber deposits, cleaners, fuel detergents (which actually are responsible for some common deposits, strange as that may seem), and a light went off over my head when I read about "carbon knock" or "carbon rap." Sounds just like the annoying cold engine knocking I never successfully tracked down or fixed on my old 1995 Mercury Villager, and which is starting to appear on the 1998 one I still have. I may be using something like Seafoam before long.