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EGR Function Testing Dodge Dakota I

Testing & Diagnostics ~182 words

PORTED EGR SYSTEM

  1. Check vacuum lines for correct routing. Warm engine to operating temperature. Some models with EGR delay timers must operate at least 1-2 minutes for EGR to function.
  2. While watching EGR pintle, abruptly accelerate engine to 2000-3000 RPM. EGR pintle should open at least 1/8". If EGR pintle does not move, check for cracked, leaking, disconnected or plugged vacuum hose. Verify correct vacuum hose routing.
  3. Connect a hand-held vacuum pump to EGR valve. Idle engine and gradually apply a minimum of 10 in. Hg. EGR valve stem should move and engine speed should drop at least 150 RPM.

EGR VALVE/BACKPRESSURE TRANSDUCER ASSEMBLY

  1. Check vacuum hoses for correct routing. Warm engine to normal operating temperature. Connect a vacuum pump to EGR valve. With engine idling, slowly apply 2-3 in. Hg. Engine RPM should drop when vacuum is applied.
  2. Disconnect vacuum pump from EGR valve. Connect vacuum gauge to EGR vacuum supply hose. Start engine and raise engine speed to 2000 RPM. Vacuum gauge should read about 5 in. Hg. If test results are as specified, system is okay.

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