L-Series Sedan (4 Door) 4WD F4-1781cc 1.8L SOHC (SPFI) (1986)
_4wd/f4-1781cc_1.8l_sohc_(spfi)/Page-702001.png)
EGR Valve: Description and Operation
Exhaust Gas Recirculation System
PURPOSE
Control amount of exhaust gas recirculation.
LOCATION
On the back of intake manifold.
OPERATION
The Electronic Control Unit signals the EGR solenoid to switch from ported vacuum to atmospheric pressure, thereby opening and closing the
EGR valve. The EGR valve opens in response to engine driving conditions and provides a portion of exhaust gas to the cylinders through the
intake manifold. EGR valve vacuum signal is picked up from a port upstream from the throttle valve.
