Series 50G & 60G Troubleshooting

Section 8.2 Backfire

Section 8.2
Backfire

To determine if any ECM problems apply to the engine Backfire condition, perform the following:‪

  1. Turn on the ignition. Plug the Diagnostic Data Reader (DDR) or the Detroit Diesel Diagnostic Link (DDDL) into the Diagnostic Connector.

    Note: Use the Pro-Link kit to connect the DDR. Use PC card installed in the computer to connect the DDDL.

  2. Use the DDR or DDDL to display which ECM is on the engine.
  3. Use the DDR or DDDL to confirm that the proper calibration is in the ECM.
    1. If the improper calibration is in the ECM, call Detroit Diesel Technical Service.
    2. If the proper calibration is in the ECM, go to step 4 .
  4. Determine whether the backfire is taking place during engine deceleration or during engine shutdown.
    1. If the backfire occurs during engine deceleration, check Pulse Width Modulated Stepper Motor Valve (PSV) operation. Refer to "8.3.1 PSV Operation Check" .
    2. If the backfire occurs during engine shutdown, check the fuel line installation and low pressure valve shut off. Refer to "8.6 Shutdown" .


Series 50G and 60G Troubleshooting Guide - 6SE482
Generated on 10-13-2008

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