ENGINE SYMPTOM TROUBLESHOOTING[AJ (3.0L Duratec)]

id0103a7800500

• Confirm trouble symptom using the following diagnostic index, then go to the appropriate trouble shooting chart.

SYMPTOM DIAGNOSTIC INDEX

No.

TROUBLESHOOTING ITEM

DESCRIPTION

PAGE

1

Melting of main or other fuses

—

(See NO.1 MELTING OF MAIN OR OTHER FUSES[AJ (3.0L Duratec)].)

2

MIL comes on

MIL is illuminated incorrectly.

(See NO.2 MIL COMES ON[AJ (3.0L Duratec)].)

3

Will not crank

Starter does not work.

(See NO.3 WILL NOT CRANK[AJ (3.0L Duratec)].)

4

Hard start/long crank/erratic start/erratic crank

The starter cranks engine at normal speed but the engine requires excessive cranking time before starting.

(See NO.4 HARD START/LONG CRANK/ERRATIC START/ERRATIC CRANK[AJ (3.0L Duratec)].)

5

Engine stalls

After start/at idle

The engine stops unexpectedly at idle and/or after starting.

(See NO.5 ENGINE STALLS-AFTER START/AT IDLE[AJ (3.0L Duratec)].)

6

Cranks normally but will not start

The starter cranks the engine at normal speed but the engine will not run.

(See NO.6 CRANKS NORMALLY BUT WILL NOT START[AJ (3.0L Duratec)].)

7

Slow return to idle

The engine takes more time than normal to return to idle speed.

(See NO.7 SLOW RETURN TO IDLE[AJ (3.0L Duratec)].)

8

Engine runs rough/rolling idle

The engine speed fluctuates between the specified idle speed, and a lower speed, and the engine shakes excessively.

(See NO.8 ENGINE RUNS ROUGH/ROLLING IDLE[AJ (3.0L Duratec)].)

9

Fast idle/runs on

The engine speed continues at fast idle after warm-up.

The engine runs after ignition switch is turned to the off position.

(See NO.9 FAST IDLE/RUNS ON[AJ (3.0L Duratec)].)

10

Low idle/stalls during deceleration

Engine stops unexpectedly at beginning of deceleration or recovery from deceleration.

(See NO.10 LOW IDLE/STALLS DURING DECELERATION[AJ (3.0L Duratec)].)

11

Engine stalls/quits

Acceleration/cruise

Engine stops unexpectedly at beginning of acceleration or during acceleration.

Engine stops unexpectedly while cruising.

(See NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES[AJ (3.0L Duratec)].)

Engine runs rough

Acceleration/cruise

Engine speed fluctuates during acceleration or cruising.

Misses

Acceleration/cruise

Engine misses during acceleration or cruising.

Buck/jerk

Acceleration/cruise/deceleration

Vehicle bucks/jerks during acceleration, cruising, or deceleration.

Hesitation/stumble

Acceleration

Momentary pause at beginning of acceleration, or during acceleration

Surges

Acceleration/cruise

Momentary minor irregularity in engine output

12

Lack/loss of power

Acceleration/cruise

Performance poor under load (e.g. powers down when climbing hills).

(See NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE[AJ (3.0L Duratec)].)

13

Knocking/pinging

Acceleration/cruise

Sound is produced when air/fuel mixture is ignited by something other than spark plug (e.g. hot spot in combustion chamber).

(See NO.13 KNOCKING/PINGING/DETONATION-ACCELERATION/CRUISE[AJ (3.0L Duratec)].)

14

Poor fuel economy

Fuel economy is unsatisfactory.

(See NO.14 POOR FUEL ECONOMY[AJ (3.0L Duratec)].)

15

Emissions compliance

Fails emissions test

(See NO.15 EMISSION COMPLIANCE[AJ (3.0L Duratec)].)

16

High oil consumption/leakage

Oil consumption is excessive.

(See NO.16 HIGH OIL CONSUMPTION/LEAKAGE[AJ (3.0L Duratec)].)

17

Cooling system concerns

Overheating

The engine runs at higher than normal temperature/overheats.

(See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING[AJ (3.0L Duratec)].)

18

Cooling system concerns

Runs cold

Engine does not reach normal operating temperature.

(See NO.18 COOLING SYSTEM CONCERNS-RUNS COLD[AJ (3.0L Duratec)].)

19

Exhaust smoke

Blue, black, or white smoke from the exhaust system

(See NO.19 EXHAUST SMOKE[AJ (3.0L Duratec)].)

20

Fuel odor (in engine compartment)

Gasoline fuel smell or visible leakage

(See NO.20 FUEL ODOR (IN ENGINE COMPARTMENT)[AJ (3.0L Duratec)].)

21

Engine noise

Engine noise from under the hood

(See NO.21 ENGINE NOISE[AJ (3.0L Duratec)].)

22

Vibration concerns (engine)

Vibration from under the hood or driveline

(See NO.22 VIBRATION CONCERNS (ENGINE)[AJ (3.0L Duratec)].

23

A/C does not work sufficiently

The A/C compressor magnetic clutch does not engage when A/C is turned on.

(See NO.23 A/C DOES NOT WORK SUFFICIENTLY[AJ (3.0L Duratec)].)

24

A/C always on or A/C compressor runs continuously.

The A/C compressor magnetic clutch does not disengage.

(See NO.24 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY[AJ (3.0L Duratec)].)

25

A/C does not cut off under wide open throttle conditions.

A/C compressor magnetic clutch does not disengage under wide open throttle.

(See NO.25 A/C DOES NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS[AJ (3.0L Duratec)].)

26

Exhaust sulphur smell

Rotten egg smell (sulphur) from exhaust

(See NO.26 EXHAUST SULPHUR SMELL[AJ (3.0L Duratec)].)

27

Constant voltage

Incorrect constant voltage

(See NO.27 CONSTANT VOLTAGE[AJ (3.0L Duratec)].)

28

Spark plug condition

Incorrect spark plug condition

(See NO.28 SPARK PLUG CONDITION[AJ (3.0L Duratec)].)

29

ATX concerns

Upshift/downshift/engagement

ATX concerns not related to engine performance

(See SYMPTOM TROUBLESHOOTING ITEM TABLE[LA4AX-EL (CD4E)].)

No.	TROUBLESHOOTING ITEM		DESCRIPTION	PAGE
1	Melting of main or other fuses		—	(See NO.1 MELTING OF MAIN OR OTHER FUSES[AJ (3.0L Duratec)].)
2	MIL comes on		MIL is illuminated incorrectly.	(See NO.2 MIL COMES ON[AJ (3.0L Duratec)].)
3	Will not crank		Starter does not work.	(See NO.3 WILL NOT CRANK[AJ (3.0L Duratec)].)
4	Hard start/long crank/erratic start/erratic crank		The starter cranks engine at normal speed but the engine requires excessive cranking time before starting.	(See NO.4 HARD START/LONG CRANK/ERRATIC START/ERRATIC CRANK[AJ (3.0L Duratec)].)
5	Engine stalls	After start/at idle	The engine stops unexpectedly at idle and/or after starting.	(See NO.5 ENGINE STALLS-AFTER START/AT IDLE[AJ (3.0L Duratec)].)
6	Cranks normally but will not start		The starter cranks the engine at normal speed but the engine will not run.	(See NO.6 CRANKS NORMALLY BUT WILL NOT START[AJ (3.0L Duratec)].)
7	Slow return to idle		The engine takes more time than normal to return to idle speed.	(See NO.7 SLOW RETURN TO IDLE[AJ (3.0L Duratec)].)
8	Engine runs rough/rolling idle		The engine speed fluctuates between the specified idle speed, and a lower speed, and the engine shakes excessively.	(See NO.8 ENGINE RUNS ROUGH/ROLLING IDLE[AJ (3.0L Duratec)].)
9	Fast idle/runs on		The engine speed continues at fast idle after warm-up. The engine runs after ignition switch is turned to the off position.	(See NO.9 FAST IDLE/RUNS ON[AJ (3.0L Duratec)].)
10	Low idle/stalls during deceleration		Engine stops unexpectedly at beginning of deceleration or recovery from deceleration.	(See NO.10 LOW IDLE/STALLS DURING DECELERATION[AJ (3.0L Duratec)].)
11	Engine stalls/quits	Acceleration/cruise	Engine stops unexpectedly at beginning of acceleration or during acceleration. Engine stops unexpectedly while cruising.	(See NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES[AJ (3.0L Duratec)].)
	Engine runs rough	Acceleration/cruise	Engine speed fluctuates during acceleration or cruising.
	Misses	Acceleration/cruise	Engine misses during acceleration or cruising.
	Buck/jerk	Acceleration/cruise/deceleration	Vehicle bucks/jerks during acceleration, cruising, or deceleration.
	Hesitation/stumble	Acceleration	Momentary pause at beginning of acceleration, or during acceleration
	Surges	Acceleration/cruise	Momentary minor irregularity in engine output
12	Lack/loss of power	Acceleration/cruise	Performance poor under load (e.g. powers down when climbing hills).	(See NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE[AJ (3.0L Duratec)].)
13	Knocking/pinging	Acceleration/cruise	Sound is produced when air/fuel mixture is ignited by something other than spark plug (e.g. hot spot in combustion chamber).	(See NO.13 KNOCKING/PINGING/DETONATION-ACCELERATION/CRUISE[AJ (3.0L Duratec)].)
14	Poor fuel economy		Fuel economy is unsatisfactory.	(See NO.14 POOR FUEL ECONOMY[AJ (3.0L Duratec)].)
15	Emissions compliance		Fails emissions test	(See NO.15 EMISSION COMPLIANCE[AJ (3.0L Duratec)].)
16	High oil consumption/leakage		Oil consumption is excessive.	(See NO.16 HIGH OIL CONSUMPTION/LEAKAGE[AJ (3.0L Duratec)].)
17	Cooling system concerns	Overheating	The engine runs at higher than normal temperature/overheats.	(See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING[AJ (3.0L Duratec)].)
18	Cooling system concerns	Runs cold	Engine does not reach normal operating temperature.	(See NO.18 COOLING SYSTEM CONCERNS-RUNS COLD[AJ (3.0L Duratec)].)
19	Exhaust smoke		Blue, black, or white smoke from the exhaust system	(See NO.19 EXHAUST SMOKE[AJ (3.0L Duratec)].)
20	Fuel odor (in engine compartment)		Gasoline fuel smell or visible leakage	(See NO.20 FUEL ODOR (IN ENGINE COMPARTMENT)[AJ (3.0L Duratec)].)
21	Engine noise		Engine noise from under the hood	(See NO.21 ENGINE NOISE[AJ (3.0L Duratec)].)
22	Vibration concerns (engine)		Vibration from under the hood or driveline	(See NO.22 VIBRATION CONCERNS (ENGINE)[AJ (3.0L Duratec)].
23	A/C does not work sufficiently		The A/C compressor magnetic clutch does not engage when A/C is turned on.	(See NO.23 A/C DOES NOT WORK SUFFICIENTLY[AJ (3.0L Duratec)].)
24	A/C always on or A/C compressor runs continuously.		The A/C compressor magnetic clutch does not disengage.	(See NO.24 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY[AJ (3.0L Duratec)].)
25	A/C does not cut off under wide open throttle conditions.		A/C compressor magnetic clutch does not disengage under wide open throttle.	(See NO.25 A/C DOES NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS[AJ (3.0L Duratec)].)
26	Exhaust sulphur smell		Rotten egg smell (sulphur) from exhaust	(See NO.26 EXHAUST SULPHUR SMELL[AJ (3.0L Duratec)].)
27	Constant voltage		Incorrect constant voltage	(See NO.27 CONSTANT VOLTAGE[AJ (3.0L Duratec)].)
28	Spark plug condition		Incorrect spark plug condition	(See NO.28 SPARK PLUG CONDITION[AJ (3.0L Duratec)].)
29	ATX concerns	Upshift/downshift/engagement	ATX concerns not related to engine performance	(See SYMPTOM TROUBLESHOOTING ITEM TABLE[LA4AX-EL (CD4E)].)