Symptom Chart

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. 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/lack of power	Clogged air cleaner element or restriction upstream of compressor	INSTALL a new air cleaner element. REMOVE the restriction.
	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 damage	INSTALL a new turbocharger.
	Turbocharger bearings seized	INSTALL a new turbocharger.
	Turbocharger variable vane hydraulic control valve not functioning	REFER to the INTRODUCTION - GASOLINE article.
	Damaged charge air cooler (CAC)	REPAIR or INSTALL a new charge air cooler (CAC).
	Damaged/defective manifold absolute pressure (MAP) sensor or hose	INSTALL a new MAP sensor or hose.
	Insufficient fuel supply	REPAIR or INSTALL new fuel system components as required.
	Exhaust leak between manifold and turbine housing	REPAIR as needed.
	Low compression	REPAIR as required.
Excessive fuel consumption (black exhaust smoke)	High fuel pressure Fuel pressure regulator	REPAIR as required. REFER to the INTRODUCTION - GASOLINE article.
	Fuel return tube plugged or kinked	CLEAN or INSTALL a new fuel return tube as required.
	Injectors leaking	INSTALL new injectors.
	Powertrain control module malfunctioning	REFER to the INTRODUCTION - GASOLINE article.
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 air cleaner element or restriction upstream of compressor Engine wear (piston rings, valve guides)	REPAIR as required.
	Turbocharger oil seals leaking	REFER to TURBOCHARGER INTERNAL OIL LEAK TEST .
	Injector or injector O-ring leaking	REFER to the INTRODUCTION - GASOLINE article.
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.
	Turbine bearing failure	INSTALL a new turbocharger.
High boost	Leak in exhaust system before muffler	REPAIR as required.
High boost	Malfunctioning turbocharger variable vane hydraulic control valve	REFER to the INTRODUCTION - GASOLINE article.