Component Tests and General Diagnostics

DIAGNOSIS AND TESTING - SRT4

During normal operation the SRT - 4 turbocharger will emit a very high frequency whistle at full boost 68.9 - 103.4 kPa (10 - 15 psi) during WOT acceleration.

During throttle tip-out, the surge valve will emit a light air "woosh" noise. If there is excessive NVH or other air leak/turbocharger noises, the intercooler plumbing or turbocharger control system may be compromised.

To identify the source of the concern, check for Diagnostic Trouble Codes (DTC'S) stored in PCM memory. If any DTC'S are present, refer to the appropriate Powertrain Diagnostic Information.
If there are no DTC'S stored, use the foiling chart.