Engine Won't Start has fire has fuel

Engine has had intermittent miss at idle for a few weeks, and slight hesitation due to the miss from a stop but has not had apparent power loss at engine speeds above idle. I have not had hard starting problems. Today the engine would not start, it just cranks. Crank speed is normal. I pulled #2 and #4 plug wires, both have spark sufficient to jump at least ~1/2 inch gap to the exhaust manifold. I noted that the spark on both cylinders is orange, not white-blue as I expected. Pulled air inlet tube from throttle body and sprayed flammable brake cleaner past open throttle plate, still would not run engine. The theft light comes on solid when key is turned on but does not flash, and goes out when the ignition switch is in the start position. Have not had service engine soon light with the engine miss, but since it will not start the SES light is on now. I don't have a code scanner.