Diagnostics Driveability & Performance
We offer three levels of driveability/performance tests to track down even the most elusive performance problems.
- Battery cables and connections
- Spark plug wires and secondary ignition components
- Vacuum hoses and routing
- Air inlet ducting
- Wiring to sensors and actuators
Road test vehicle to verify symptoms
Check coolant level & engine operating temperature
Check system charging voltage and electrical system noise
Check idle speed
Check base ignition timing, dwell, and operation of timing advance controls
Check engine vacuum: cranking, idle & 2500 rpm
Analyze primary & secondary ignition signals on oscilloscope
Perform cylinder power balance test
Check fuel pressure
Check tail pipe emissions readings
Check for vacuum leaks
Pull and record Diagnostic Trouble Codes (DTCs)
Check for related technical service bulletins or IdentaFix® bulletins
Analyze data and recommend necessary repairs
Perform additional, symptom specific diagnostics
Diagnose relevant DTCs
Lab scope analysis of sensors and actuators
Additional road testing as needed for dynamic tests of engine control systems and intermittent problems
Access diagnostic hot line and on-line sources
If cold start or warm up problem exists, vehicle will be needed for a minimum of two days.
Tests of warm engine parameters will be checked the first day and specific cold running systems will be checked the following day.
Level 3 diagnostics are geared toward problems that are very intermittent and require extensive time to duplicate. Due to the nature of Level 3 diagnostics, appropriate tests are selected based on the nature of the symptoms and the results of earlier diagnostic tests.
Level 3 includes time for set up and road testing of vehicle with specialized equipment as needed and also includes time for an additional technician's time to monitor equipment during road tests for safe operation of the vehicle.