Pinpoint Test C: Loss Of Power
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Possible Sources
- Air cleaner
- Air intake
- Exhaust restricted
- Turbocharger
- Internal engine damage
- C1 CHECK FOR PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON.
- Carry out the PCMKOEO and KOER self-tests.
Are any Diagnostic Trouble Codes (DTCs) present?
Yes REFER to the Master DTC Chart to diagnose the DTC present. No GO to C2 - C2 CHECK THE AIR CLEANER
- Inspect the air cleaner.
Is the air cleaner clogged?
Yes REPLACE the air cleaner. Check the system for normal operation. No GO to C3 - C3 CHECK THE AIR INTAKE SYSTEM
- Check the air intake system, air cleaner and CAC components, ducts, pipes and hoses. Check that all components are installed correctly and tight. Check that all components are aligned correctly. Check for damage that could cause an air-intake leak resulting in a noise from the turbocharger(s). For additional information, refer to the INTAKE AIR DISTRIBUTION AND FILTERING - 3.5L ECOBOOST (BM) for the engine being diagnosed.
Does the air intake system have any leaks?
Yes Repair as necessary. Refer to the INTAKE AIR DISTRIBUTION AND FILTERING - 3.5L ECOBOOST (BM) for the engine being diagnosed. No GO to C4 - C4 CHECK THE EXHAUST SYSTEM
- Check the exhaust system for restrictions or damage. Refer to the EXHAUST SYSTEM - 3.5L ECOBOOST (BM) for the engine being diagnosed.
Is the exhaust system restricted or damaged?
Yes REPAIR as necessary. Refer to the EXHAUST SYSTEM - 3.5L ECOBOOST (BM) for the engine being diagnosed. No GO to C5 - C5 CHECK THE WASTEGATE
- Check the wastegate for damage, wear or correct assembly and adjustment. Check to be sure the wastegate linkage moves freely.
Is the wastegate, wastegate actuator or linkage damaged, worn, assembled or adjusted incorrectly?
Yes REPAIR as necessary. Refer to Turbocharger for the engine being diagnosed. No GO to C6 - C6 CHECK THE TURBOCHARGER
- Remove the air cleaner outlet pipe and CAC intake pipe.
- Inspect the compressor wheel for damage.
- Check that the turbine shaft spins free and is not loose in the housing.
- Check for contact marks between the compressor wheel and the housing.
Is the turbocharger damaged?
Yes INSTALL a new turbocharger. No REFER to DIAGNOSIS AND TESTING to diagnose internal engine damage.