I’m trying to understand the impact of a fully or not fully functioning flywheel sensor. I’ve done some searches and have not seen a definitive answer.
Documentation on the 1992 Digital Ignition says:
“The crankshaft and engine speed inputs are necessary for the engine to start”. Then in BOLD.
NOTE: The sensors …are unique to the digital ignition system and are not used or shared by the EFI system"
Then in FUEL ECU section:
“The ECU senses engine load from Intake MAP and engine speed from the ignition pulses …The ECU receives Inputs from sensors…and the ignition system”.
It sounds as though the flywheel sensor input is being passed to the Fuel ecu from the the Ignition ecu, implying that if the sensor was flaky the car might start, but would also contribute to fueling issues.
Can anyone confirm that?
I’ve just found this thread which is an interesting/educational read.