Symptom Chart

PROBLEM SYMPTOM CHART

Condition	Possible Sources	Action
Excessive effort is needed to depress the accelerator pedal and shaft	Worn accelerator lever pivot bushing.	INSTALL a new accelerator pedal and shaft.
	The accelerator cable is binding.	INSTALL a new accelerator cable.
	Worn or damaged throttle body.	INSTALL a new throttle body. REFER to FUEL CHARGING & CONTROLS - 5.4L (2V) (5.4L), FUEL CHARGING & CONTROLS - 6.8L (2V) (6.8L).
The accelerator pedal and shaft feels rough or raspy	Frayed or binding accelerator cable.	INSTALL a new accelerator cable.
The accelerator pedal and shaft feels rough or raspy	Worn or damaged throttle body.	INSTALL a new throttle body. REFER to FUEL CHARGING & CONTROLS - 5.4L (2V) (5.4L), FUEL CHARGING & CONTROLS - 6.8L (2V) (6.8L).
The accelerator pedal and shaft is binding or sticking	Kinked accelerator cable.	INSTALL a new accelerator cable.
	Foreign object caught in the accelerator pedal linkage.	CHECK the accelerator pedal linkage.
	Worn or damaged throttle body.	INSTALL a new throttle body. REFER to FUEL CHARGING & CONTROLS - 5.4L (2V) (5.4L), FUEL CHARGING & CONTROLS - 6.8L (2V) (6.8L).
High engine idle speed	Kinked accelerator cable.	INSTALL a new accelerator cable.
	Foreign object caught in the accelerator pedal linkage.	CHECK the accelerator pedal linkage.
	Incorrect engine idle speed.	REFER to the INTRODUCTION -- GASOLINE article for diagnosis and testing of the idle control system.
Engine only idles (diesel)	Defective electronic throttle control.	REFER to the INTRODUCTION -- 6.0L DIESEL article for diagnosis and testing of the idle control system.