Originally Posted By: ahoier
Berryman's B-12 CHEMTOOL has never failed me
Treatment rate is approx. 1 oz. per gallon of fuel...typically every 5th tank-fill...as far as the fuel rail products....I've only ever had experience with the GumOut product that Walmart TLE use(d)....which has been replaced with a Valvoline 2-Step process that is supposedly "No-Smoke" (out the tail pipe...) and better for the environment.....the funny thing is, I talked to my local WM TLE shop mgr, and he said the really neglected cars, will still "smoke" when they do the fuel system service.....hehe. So it's not totally "no smoke" - basically, Valvoline just offered WM more money to feature their service.....rather than Gum Out's product (which isn't mentioned anywhere on the Gum Out.com site for that matter....which I found odd...).
But yea, I've had the GumOut service done, and they hook a little canister up to the PCV valve, and then let the engine idle til the soluton is gone. It's kind of like an IV drip
Kinda curious myself.....couldn't be that hard to DIY yourself :X lol..
That or just go with good ole water decarbonization....mist watter through the intake of the warmed up engine, the steam is said to do some very good cleaning....
Decarbonizing the combustion chambers does nothing for the injectors. Chemtool is great on varnish but how do you know if there is a varnish or particulate problem?
You don't unless you get them in a machine. The fluid was new prior to cleaning.
This is the particulate matter out on a single set of 6 injectors that were only marginally dirty.
In theory if it can get past the filter it can get through the nozzle but in reality this isn't so. The particles can bond together to form a clump that needs to be broken down.
This is a dirty filter against a new one. The filter is not that bad but it is beginning to clog.
