Anyone dealt with E85 and black "goo" on their injectors? Quick background. The last 3 days I've been wracking my brain trying to figure out why my car goes lean when I go WOT. It went from bad to worse. Not only does it go lean but it misses and shudders real bad. I have to drive the car mostly normal. If I get any kind of aggressive with the throttle it goes lean and bucks and misses like crazy. I thought I got a bad a tank of gas, drove it all out and filled up E85 from a different location, I replaced plugs, did a compression test, have double/triple checked for vacuum leaks or other issues. Data logging the car shows perfect fuel pressure, injector duty cycle increase as I step on the gas, fuel pressure increases perfectly, MAF counts go up perfectly as expected yet A/F on the wideband goes lean and the car shudders. My only conclusion was the injectors are simply not giving the fuel they are supposed to. So I pulled a rail and sure enough I see this black substance on them I've read about. They are ID1000s and Injector Dynamics has a cleaning and flow testing service but it's $200 plus shipping. Do fuel injector cleaners work for this? I've never had this E85 black goo before.