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 NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [L3 Turbo]

NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [L3 Turbo]

id0103b4801700

11

ENGINE STALLS/QUITS - ACCELERATION/CRUISE

ENGINE RUNS ROUGH - ACCELERATION/CRUISE

BUCK/JERK - ACCELERATION/CRUISE/DECELERATION

HESITATION/STUMBLE - ACCELERATION

SURGES - ACCELERATION/CRUISE

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

• A/C system improper operation
• Air leakage from intake-air system
• Intake-air system restriction
• Purge solenoid valve malfunction
• Improper operation of electronic throttle control system
• EGR system malfunction
• Low engine compression
• Turbocharger malfunction
• Improper operation of wastegate control system
• Vacuum leakage
• Poor fuel quality
• Main relay intermittent malfunction
• Throttle body malfunction
• Engine overheating
• Spark plug malfunction
• Variable swirl system malfunction
• Air cleaner restriction
• PCV valve malfunction
• Improper valve timing due to jumping out timing chain
• Exhaust system and/or three-way catalytic converter restriction
• Intermittent open or short circuit in fuel pump circuit
• Incorrect fuel injection timing
• Inadequate fuel pressure (high or low pressure side)
• Fuel pressure sensor or related circuit malfunction
• Suction control valve malfunction (built-in high pressure fuel pump)
• Relief valve malfunction (built-in delivery pipe)
• High pressure fuel pump malfunction
• Fuel injector malfunction
• Improper fuel pump speed control operation
• Fuel pump mechanical malfunction
• Fuel line restriction or clogging
• Improper air/fuel mixture ratio control operation
• Erratic or no signal from CMP sensor
• Erratic signal from CKP sensor
• A/F sensor, HO2S or related circuit malfunction
• Accelerator position sensor or related circuit malfunction
• MAF sensor or related circuit malfunction
• Neutral switch or related circuit malfunction
• ECT sensor or related circuit malfunction
• Manifold absolute pressure (MAP) sensor or related circuit malfunction
• IAT sensor No.1 or related circuit malfunction
• IAT sensor No.2 or related circuit malfunction
• Intermittent open or short circuit MAF sensor, accelerator position sensor, TP sensor and VSS
• Clutch slippage
• Injector driver module 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 REPAIR ROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.
(See BEFORE SERVICE PRECAUTION [L3 Turbo].)
(See AFTER SERVICE PRECAUTION [L3 Turbo].)
Caution
• Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION

1
Inspect for the following:
• Fuel quality (proper octane, contamination, winter/summer blend)
• Air leakage from intake-air system
• Intake-air system restriction
• Air cleaner element
• Clutch slippage
• Fuel leakage from fuel line
• Vacuum leakage
Are all items normal?
Yes
Go to the next step.
No
Service if necessary.
Repeat Step 1.
2
Perform the self-test function using the WDS or equivalent.
Turn the ignition switch to the ON position.
Retrieve any DTCs.
Is a DTC displayed?
Yes

DTC is displayed:

Go to the appropriate DTC test.
No

No DTC is displayed:

Go to the next step.
3
Access the ECT PID.
Verify that the ECT PID is less than 116°C {241°F} during driving.
Is the ECT PID less than specified?
Yes
Go to the next step.
No
The cause of this concern could be from the cooling system overheating.
Perform the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS - OVERHEATING."
4
Perform the Main Relay Operation Inspection with wiggle the related harness.
Does the main relay operate properly?
Yes
Go to the next step.
No
Repair or replace for the intermittent fault.
5
Inspect CMP and CKP sensor for the following;
• Installation condition
• Damaged trigger wheel and camshaft
• Open or short circuit in the wiring harnesses
Is there any malfunction detected?
Yes
Repair or replace the malfunctioning part according to the inspection results.
No
Go to the next step.
6
Connect the WDS or equivalent to DLC-2.
Access and monitor following PIDs using the data monitor function while wiggle the harness and under trouble condition.
• APP
• ECT
• MAF
• IAT
• IAT2
• MAP
• FP
• VSS
• O2S11
• O2S12
• LONGFT1
• SHTFT1
• CPP (PCM terminal 1H)
• PNP (PCM terminal 1W)
Do the PIDs indicate correct values?
Yes
Go to the Step 13.
No
Inspect and repair or replace suspected parts and related harnesses.
If the malfunction remains, perform the intermittent concern troubleshooting.
If the MAP PID remains without specified, go to the next step.
7
Perform the EGR system operation inspection.
Does EGR system operate properly?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
8
Perform the A/C Cut-off Operation Inspection.
Does the A/C Cut-off Operation work properly?
Yes
Go to the next step.
No
Repair or replace malfunctioning parts, according to inspection results.
9
Perform the TP sweep inspection.
Does the electronic throttle control system work properly?
Yes
Visually inspect the throttle body (damaged/scratching.) If normal, go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
10
Perform the Variable Swirl Control System Operation Inspection.
Does the variable swirl system work properly?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
11
Perform the Purge Control System Operation Inspection.
Does the purge control system work properly?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
12
Perform the Fuel Pump Speed Control Inspection.
Does the fuel pump speed control work properly?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
13
Perform the Wastegate Control System Operation Inspection.
Does the wastegate control system work properly?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
14
Remove the parts necessary to inspect turbocharger without remove the turbocharger.
Inspect if turbocharger compressor wheel is bent, damaged, or interfering with housing on vehicle.
Is there any problem?
Yes
Replace the turbocharger.
No
Go to the next step.
15
Inspect the turbocharger compressor wheel locknut is loose or has fallen down inside turbocharger.
Is there any problem?
Yes
Replace the turbocharger.
No
Go to the next step.
16
Inspect if turbocharger compressor wheel by hand.
Does the wheel turn easily and smoothly?
Yes
Go to the next step.
No
Replace the turbocharger.
17
Inspect the turbocharger turbine wheel is damaged, cracked or interfering with housing on vehicle.
Note
• Inspect all fins on each turbine wheel.
Is there any problem?
Yes
Replace the turbocharger.
No
Go to the next step.
18
Is any engine oil found inside turbocharger turbine housing?
Yes

Excessive amount of oil is found:

Replace the turbocharger.

Small amount of oil is found:

Wipe oil out of vehicle, then go to the next step.
No
Go to the next step.
19
Is any engine oil found inside turbocharger compressor housing?
Yes
Wipe oil out vehicle and install all removed parts in Step 14. Then, go to the next step.
No
Turbocharger is normal.
Install all parts removed in Step 14.
Then, go to the next step.
20
Inspect for restriction in the exhaust system and three-way catalytic converter (TWC).
Is there any restriction?
Yes
Replace the malfunctioning part.
No
Go to the next step.
21
Remove and shake the PCV valve.
Does the PCV valve rattle?
Yes
Go to the next step.
No
Replace the PCV valve.
22
Perform the spark test.
(See Spark Test.)
Is a strong blue spark visible at each cylinder?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
23
Access and monitor the FUEL_PRES PID.
Is the FUEL_PRES PID value within the specification?
Yes
Go to Step 27.
No
Go to the next step.
24
Is the vehicle accelerate performance normally?
Yes
Go to the next step.
No
Go to Step.26.
25
Inspect the fuel pressure sensor.
Is the fuel pressure sensor normal?
Yes
Go to the Step 27.
No
Replace the delivery pipe.
26
Replace the high pressure fuel pump.
Monitor FUEL_PRES PID.
Is the FUEL_PRES PID value within the specified?
Yes
Troubleshooting is completed.
Go to Step 30.
No
Go to the next step.
27
Connect the fuel pressure gauge between the fuel pump and the high pressure fuel pump.
Measure the fuel pressure line of the low pressure side.
Is the fuel pressure with in the specification?
Yes
Go to the next step.
No
Inspect for the following:
• Fuel line restriction
• Fuel filter clogging
If normal replace the fuel pump.
28
Inspect the fuel injector for each cylinder.
Are fuel injectors normal?
Yes
Go to the next step.
No
Replace the suspected fuel injector.
29
Measure the compression pressure for each cylinder.
Are compression pressures within the specification?
Yes
Replace the injector driver module.
If the problem remains, overhaul the engine.
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.
30
Verify test results.
• If normal, return to the diagnostic index to service any additional symptoms.
• If a malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform the repair or diagnosis.
- If the vehicle is repaired, troubleshooting is completed.
- If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.