Pickup 4WD L4-155 2555cc 2.6L SOHC VIN E 2-bbl (1988)
Engine Speed Sensor: Description and Operation
The engine speed signal is obtained from the ignition coil. Electric signals are sent to the ECU where the time between these pulses is used to calculate
engine speed, controlling fuel delivery, secondary air management, deceleration spark and throttle opener operation.