Quote Originally Posted by J. Fast View Post
I remember the Coloradodsm thread in 2009. Sure wad a good thread. If you recall later in thread around post 145 and later it was determined the gum exists in pump gas also. Once you develop gum you have to clean the injectors with fuels free of the additives.

Additionally one of the remedies was to eliminate the fuel rail pressure on shutdown to keep the ethanol from hanging on the backside of the injectors and causing the pintles to stick when the alcohol evaporated leaving behind the additives. Remember too, Jake was using E95 and the contaminants were not present in his fuel.

I believe the issue has long since been resolved by improving fuel injectors and by changing the blending package. I still have yet to clog an injector or see buildup residue. It might also be due to the fact I bleed off my fuel rail pressure on engine kill.

Mine didn't seem to clog entirely, it would idle and mild drive ok. It was under boost where it seems a single cylinder just couldn't keep up.