Originally Posted by Mep
I've noticed this too. It tells me that the mixture while starting is too rich (not enough air or too much fuel), or the ignition is not enabled. It's most likely the latter. The computer is probably waiting for a signal from the tac or the oil pressure transmitter to say that the engine is being cranked before giving the signal to fire a spark. A stupid design if it is.
Well, it's kind of necessary for the ECU to know where the crankshaft is to know when to fire which plug and when.
I found that out the hard way years ago. 200 miles from home, the remnants of Hurricane Ike blew through Michigan, and after driving in rain so heavy I didn't know it was even possible to have that much water fall from the sky, that sensor died in my Civic (it was part of the distributor in that car). No spark because it didn't know when to make spark. It was a weird experience - I was driving down the road in 5th gear, the car just starts slowing down and I looked down and the tach read 0 when still in gear at speed. Scared me half to death. I initially thought I snapped the timing belt.