Crank the engine. At around 1/4 second, sounds like its going to start (it fired). Remainder of time, nothing but turns over. Tried pedal to the metal for 10 seconds as well.
Removed the electrical connector to the cold start valve, car starts immediately and remains running normally. Drives same as before this came up.
Hmmm Possibly weak ign spark from an ign coil or other bad ign components. Next time it won't start pull a couple of spark plugs and inspect their electrodes and the cylinder area for excess fuel.
Looks like the thermo-time switch. For those that don't know, it determines the amount of time the cold start valve is active.
Instead of doing that long-winded check noted in the Bentley, I simply removed the electrical connector and checked the thermo-time switch while cold. Read continuity. Good. Started the engine and monitored resistance. Maintains continuity throughout warmup period, including when at full operating temperature.
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