Originally Posted by CruisinGA
More throttle=less vacuum.
I have used a 50/50 mix of water and brake fluid to do the same thing.
You ever seen the head or piston from a cylinder with a head gasket leak? Spotless!
Yep nothing like using cheap H20 to clean a top end. small vacuum hose in cup + moderate revs + attached to small port on intake or carburetor = clean engine.