Engine

2.3L EcoBoost (231kW/314PS), Diagnosis and Testing). TEST the system for normal operation after the repair.

Turbocharger REPAIR as necessary. TEST the system imbalance due to for normal operation after the repair. foreign object/damage

Turbine bearing failure INSPECT the turbocharger. REFER to

the Check for Free Rotation - Off Vehicle. REFER to: Turbocharger (303-04E Fuel Charging and Controls - Turbocharger -

2.3L EcoBoost (231kW/314PS), Diagnosis and Testing). TEST the system for normal operation after the repair.

Inoperative Refer to Powertrain Control/Emissions turbocharger bypass Diagnosis (PC/ED) manual. valve

Whine or air rush type Turbocharger Acceptable condition. Some whine or air noise noise is common.

Chrip or whoosh sound Turbocharger bypass CHECK the turbocharger bypass valve.

valve REPAIR as necessary. TEST the system

for normal operation after the repair.

Hissing noise - occurs Vacuum leak Use the Ultrasonic Leak during idle or high idle that Detector/EngineEAR to locate the is apparent with the hood source. Scan the air intake system from open the inlet to each cylinder intake port.

DISCARD the leaking parts, and INSTALL a new component. TEST the system for normal operation after the repair.

Vehicles with a plastic Acceptable condition. Some plastic intake manifold manifolds exhibit this noise, which is the

effect of the plastic manifold.

Grinding noise - occurs Incorrect starter motor INSPECT the starter motor for correct during engine cranking mounting mounting. REPAIR as necessary. Refer

to the appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Starter motor CHECK the starter motor. INSTALL a

new starter motor as necessary. Refer to the appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Incorrect starter motor INSPECT the starter motor drive for drive engagement wear or damage. INSTALL a new starter

motor as necessary. Refer to the appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair. INSPECT the flywheel/flexplate for wear or damage. INSTALL a new flywheel/flexplate as necessary. Refer to the appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Engine noise, front of Damaged or separated CHECK for obvious signs of damage or