NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [MZR-CD (RF Turbo)]

BME010300103282

11

ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES

DESCRIPTION

• Engine stops unexpectedly at beginning of acceleration or during cruise.
• Engine stops unexpectedly while cruising.
• Engine speed fluctuates during acceleration or cruising.
• Engine misses during acceleration or cruising.
• Vehicle bucks/jerks during acceleration, during or deceleration.
• Momentary pause at beginning of acceleration or during acceleration.
• Momentary minor irregularity in engine output.

POSSIBLE CAUSE

• Poor fuel quality
• Glow system malfunction
• Air leakage from intake-air system
• Intake-air system restriction
• Air cleaner restriction
• Engine overheating
• A/C system improper operation
• Turbocharger malfunction
• Variable swirl control (VSC) system malfunction
• EGR system malfunction
• Neutral switch or related circuit malfunction
• Vacuum leakage
• Fuel line restriction
• Fuel filter clogging
• Incorrect fuel injection timing
• Erratic signal from CKP sensor
• Erratic signal from CMP sensor
• ECT sensor or related circuit malfunction
• Boost sensor or related circuit malfunction
• Accelerator pedal position sensor or related circuit malfunction
• MAF/IAT sensor or related circuit malfunction
• IAT sensor No.2 or related circuit malfunction
• Intermittent open or short circuit MAF sensor, accelerator pedal position sensor, idle switch and VSS
• Incorrect adjustment accelerator pedal position sensor and/or idle switch
• Incorrect idle speed
• Inadequate fuel pressure
• Fuel pressure sensor or related circuit malfunction
• Suction control valve malfunction (built-in supply pump)
• Fuel pressure limiter malfunction (built-in common rail)
• Supply pump malfunction
• Fuel injector malfunction
• Low engine compression
• Improper valve timing
• Exhaust system and/or catalyst converter restriction
• Clutch slippage
• IDM or related circuit malfunction
Warning
The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual.
(See BEFORE SERVICE PRECAUTION [MZR-CD (RF Turbo)].)
(See AFTER SERVICE PRECAUTION [MZR-CD (RF Turbo)].)

Diagnostic Procedure

STEP

INSPECTION

RESULTS

ACTION

1
Is idle speed stable?
Yes
Go to the next step.
No
Go to symptom troubleshooting "NO.8 ENGINE RUNS ROUGH/ROLLING IDLE".
2
Is the engine overheating?
Yes
Go to symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS-OVERHEATING".
No
Go to the next step.
3
Perform self-test function using the WDS or equivalent.
Turn the engine switch to the ON position.
Retrieve any DTC.
Is DTC displayed?
Yes

DTC is displayed:

Go to the applicable DTC inspection.

Communication error message is displayed:

Inspect for the following:
• Open circuit between PCM control relay and PCM terminal 53 or 79
• Open circuit PCM control relay and PCM terminal 69
• PCM control relay stuck open
• Open or poor GND circuit (PCM terminal 65, 85, 103 or 104)
• Poor connection vehicle body GND
No

No DTC is displayed:

Go to the next step.
4
Inspect for the following:
• Fuel quality (e.g.: including water contamination, winter/summer blend)
• Fuel line/fuel filter clogging and/or restriction
• Intake-air system restriction
• Exhaust system and/or catalyst converter restriction
Are all items normal?
Yes
Go to the next step.
No
Service if necessary.
Repeat Step 4.
5
Does the engine run normal after warm up?
Yes
Inspect the glow system operation.
Replace the malfunctioning part if necessary.
If the glow system is normal, go to the next step.
No
Go to the next step.
6
Note
• The following test should be performed on the vehicles with the A/C system. If the following test cannot be performed due to engine stalling, go to the next step.
• Go to the next step for the vehicle without the A/C system.
Connect a pressure gauge to A/C line.
Turn the blower and the A/C switches on.
Is pressure within the specification?
Yes
Go to the next step.
No

A/C is always on:

Go to symptom troubleshooting "NO.24 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY".

Other symptoms:

Inspect the following:
• Refrigerant charging amount
• Main fan and/or additional fan operation
7
Inspect hose bands between the following parts:
• Turbocharger compressor housing and air cleaner
• Turbocharger compressor housing and charge air cooler
Are hose bands loose?
Yes
Retighten hose bands.
If concern is resolved, complete the inspection.
If concern still exists, go to the next step.
No
Go to the next step.
8
Inspect for improper operation, kinks, clogging or disconnection on the guide blade actuator.
Is the guide blade actuator normal?
Yes
The turbocharger is normal.
Go to the next step.
No
Repair or replace if necessary.
If concern is resolved, complete the inspection.
If concern still exists, the turbocharger is normal.
Go to the next step.
9
Perform the EGR system inspection.
Is the EGR system normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the EGR system operation results.
10
Inspect idle speed.
Is idle speed correct?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the idle speed inspection results.
11
Inspect adjustment of the accelerator pedal position sensor and the idle switch.
Are the accelerator pedal position sensor and the idle switch adjusted correctly?
Yes
Go to the next step.
No
Adjust the accelerator pedal position sensor and the idle switch correctly.
12
Inspect adjustment of the neutral switch.
Is the neutral switch adjusted correctly?
Yes
Go to the next step.
No
Adjust the neutral switch correctly.
13
Visually inspect the CKP sensor and teeth of the pulse wheel.
Are the CKP sensor and teeth of the pulse wheel normal?
Yes
Go to the next step.
No
Replace the malfunctioning parts.
14
Measure the gap between the CKP sensor and teeth of the pulse wheel.

Specification

1.5-2.5 mm {0.059-0.098 in}

Is the gap within the specification?
Yes
Go to the next step.
No
Adjust the CKP sensor position.
15
Visually inspect the CMP sensor and teeth of the pulse wheel.
Are the CMP sensor and teeth of the pulse wheel normal?
Yes
Inspect the following PIDs:
• ECT
• IAT
• MAF
• RPM
If PID value is not as specified, repair or replace the malfunctioning parts.
If PID value is normal, go to the next step.
No
Replace malfunctioning parts.
16
Inspect the fuel pressure sensor.
Is fuel pressure normal?
Yes
Go to the next step.
No
Replace the common rail.
17
Inspect the suction control valve.
Is the suction control valve normal?
Yes
Go to the next step.
No
Repair the supply pump.
18
Is the engine compression correct?
Yes
Go to the next step.
No
Inspect for the following:
• Damaged valve seat
• Worn valve stem and valve guide
• Worn or stuck piston ring
• Worn piston, piston ring or cylinder
• Improper valve timing
Service if necessary.
19
Inspect the fuel injector.
Is the fuel injector normal?
Yes
Go to the next step.
No
Repair or replace if necessary.
20
Inspect timing belt for the following:
• Chipping of gear teeth
• Low tension
• Breakage damage or cracks
Is timing belt normal?
Yes
Inspect the following:
• Clutch slippage
• CKP sensor
• VSS
If normal, remove and inspect the supply pump and the common rail.
No
If timing is incorrect, adjust valve timing.
If timing belt is not normal, replace the timing belt.
21
Verify test results.
• If normal, return to diagnostic index to service any additional symptoms.
• If malfunction remains, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)