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EGR Control Solenoid > < EGR Backpressure Transducer|Locations
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EGR Backpressure Transducer: Testing and Inspection

1. DISCONNECT VACUUM HOSES FROM EGR VACUUM MODULATOR.

Disconnect these vacuum hoses:

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Vacuum hose from R port.

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Vacuum hose from Q port.

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Vacuum hose from P port.

2. INSPECT EGR VACUUM MODULATOR OPERATION.

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Block ports P and R with your finger.

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Blow air into port Q, and check that the air passes through to the air filter side freely.

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Start the engine. and maintain speed at 3,500 rpm.

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Repeat the above test. Check that there is a strong resistance to air flow.

3. RECONNECT VACUUM HOSES TO EGR VACUUM MODULATOR.

Connect these vacuum hoses:
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Vacuum hose to R port.

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Vacuum hose to Q port.

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Vacuum hose to P port.

EGR Control Solenoid > < EGR Backpressure Transducer|Locations