Tacoma 4WD L4-164.4 2693cc 2.7L DOHC (3RZ-FE) (1996)
/Page-731001.png)
EGR Backpressure Transducer: Testing and Inspection
1. DISCONNECT VACUUM HOSES FROM EGR VACUUM MODULATOR.
2. INSPECT EGR VACUUM MODULATOR OPERATION.
-
Block ports P and R with your finger.
-
Blow air into port Q, and check that the air passes through to the air filter side freely.
-
Start the engine, and maintain speed at 3,000 rpm.
-
Repeat the above test.
-
Check that there is a strong resistance to air flow.
-
If operation is not as specified, replace the EGR vacuum modulator.
3. RECONNECT VACUUM HOSES TO EGR VACUUM MODULATOR.