the TAMIYA 1:24 Supra comes with orthographic drawings of the Supra-- (left, top, front, back views)... that's the most accurate drawing out there that I've seen, but can't help you with the CAD drawings.
Fuel injectors i'm told. Have same issue and this is what my mechanic told me. 3.0 3vze V6
The 2012 Toyota 4Runner has 24 valves.
The 2005 Toyota Sienna has 24 valves.
The 2011 Toyota Avalon has 24 valves.
The 2013 Toyota Sienna has 24 valves.
The 2010 Toyota Sienna has 24 valves.
The 2002 Toyota Avalon has 24 valves.
The 2004 Toyota Sienna has 24 valves.
The 2014 Toyota 4Runner has 24 valves.
The 2004 Toyota Tundra has 24 valves.
The 2013 Toyota 4Runner has 24 valves.