Scion fuel injectors stay open too long (over 100ms) flooding cold engine will not start. Getting spark. Heavy fuel odor. Once it starts, it runs fine when reaches running temp, and will start up after two rotations of the starter, like nothing is wrong.
Tested voltage at the coolant temp sensor and all is fine... Could that still be the issue?
Is that the sensor on the water inlet neck on the block? That's pretty much what I have it narrowed down to.