quote:
will arx remove carbon built up on the pistons by adding it to the oil?
You are talking about carbon buildup in the combustion chamber- ARX, is designed to run in the oil, and your rings are designed to keep the oil out of the combustion chamber, so ARX would have no effect on intake/combustion chamber carbon buildups...
Get the engine up to temp, (operating temp)... have a friend hold the throttle open a bit, and feed distilled water through a vacume line. (find one close to the throttle body, (but after the MAF))... take about a minut or 2 to suck up half a quart... take it for a drive to heat everything back up, then feed the second half of the quart the same as you did the first... Then run a can of BG 44K in the gas tank. Then 2 tanks with techron. Then have a look in there again. (i'm betting it'll be clean)... Then to prevent this from happening again... order FP60 and use according to instructions on every tank of gas for the remaining life of the vehicle.
(you don't have to do everything here, but try some of them, I highly recomend the water, it's cheap, if it doesn't work, you aren't out much, the BG44K, is expensive, but is very potent. Techron is easy to find, medium price, and proven reasonably effective, FP60 is a low-dose, with high returns.... often paying itself off in milage gains anyways)