Symptom Chart

WARNING: This page is about a different car, the 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
No boost/low boost	Clogged Air Cleaner (ACL) element or restriction upstream of compressor	INSTALL a new ACL element. REMOVE the restriction. REFER to INTAKE AIR DISTRIBUTION AND FILTERING article. TEST the system for normal operation.
	Compressor air intake hose collapsed	REPAIR or INSTALL a new hose as required.
	Compressor manifold hoses leaking	TIGHTEN hose clamps.
	Turbocharger turbine or compressor wheel damaged	INSTALL a new turbocharger. REFER to Turbocharger . TEST the system for normal operation.
	Turbocharger bearings seized	INSTALL a new turbocharger. REFER to Turbocharger . TEST the system for normal operation.
	Turbocharger variable vane hydraulic control valve not functioning	REFER to the appropriate Engine Performance article.
	Damaged Charge Air Cooler (CAC)	INSTALL a new CAC. REFER to INTAKE AIR DISTRIBUTION AND FILTERING article. TEST the system for normal operation.
	Damaged/defective Manifold Absolute Pressure (MAP) sensor or hose	INSTALL a new MAP sensor or hose. REFER to ELECTRONIC ENGINE CONTROLS - DIESEL ENGINE article. TEST the system for normal operation.
	Exhaust restriction or leak	REPAIR as required.
Lack of power	Low compression	REPAIR as required.
	Clogged ACL element or restriction upstream of compressor	INSTALL a new ACL element. REMOVE the restriction. REFER to INTAKE AIR DISTRIBUTION AND FILTERING article. TEST the system for normal operation.
	Insufficient fuel supply	REPAIR or INSTALL new fuel system components as required.
	Turbocharger variable vane hydraulic control valve not functioning	REFER to the appropriate Engine Performance article.
	Damaged/defective MAP sensor or hose	INSTALL a new MAP sensor or hose. REFER to ELECTRONIC ENGINE CONTROLS - DIESEL ENGINE article. TEST the system for normal operation.
	Exhaust restriction	REPAIR as required.
Excessive fuel consumption (black exhaust smoke)	High fuel pressure Fuel pressure regulator	REPAIR as required. REFER to the appropriate Engine Performance article.
	Fuel return tube plugged or kinked	CLEAN or INSTALL a new fuel return tube as required.
	Injectors leaking	INSTALL new injectors. REFER to FUEL CHARGING AND CONTROLS - 6.0L DIESEL article. TEST the system for normal operation.
	PCM malfunctioning	REFER to the appropriate Engine Performance article.
	Exhaust restriction	REPAIR as required.
Excessive oil consumption (blue, gray or white exhaust smoke)	Incorrect type or grade of oil	DRAIN and FILL with specified oil.
	Extended oil change intervals	CHANGE oil as recommended.
	Clogged ACL element or restriction upstream of compressor	REPAIR as required.
	Engine wear (piston rings, valve guides)	REPAIR as required.
	Turbocharger oil seals leaking	REFER to Turbocharger Internal Oil Leak Test.
Noise or vibration	Leaks at turbocharger inlet and outlet connections	REPAIR as required.
	Foreign object damage to turbine or compressor blades	INSTALL a new turbocharger. REFER to Turbocharger . TEST the system for normal operation.
	Turbine bearing failure	INSTALL a new turbocharger. REFER to Turbocharger . TEST the system for normal operation.
High boost	Leak in exhaust system before muffler	REPAIR as required.
	Malfunctioning turbocharger variable vane hydraulic control valve	REFER to the appropriate Engine Performance article.