Toyota Nation Forum banner
1 - 3 of 3 Posts

·
Administrator
Joined
·
14,788 Posts
The ECU looks at the ECT (Engine Coolant Temperature) sensor to know when to actuate the EGR VSV. This enables the EGR valve to operate when the engine reaches normal operating temperature. No EGR flow is desired until the engine is warmed up.

After it's enabled, the EGR vacuum modulator controls when and how much the EGR valve is opened. No flow is desired at idle and under wide open throttle. Only intermediate throttle settings.

More details in this thread. Be sure to read all the links within that thread.
 
  • Like
Reactions: John Anthony
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top