NO.13 KNOCKING/PINGING/DETONATION-ACCELERATION/CRUISE [13B-MSP]

id0103f2803800

13

KNOCKING/PINGING/DETONATION - ACCELERATION/CRUISE
DESCRIPTION
A sound is produced when the air/fuel mixture is ignited by something other than the spark plug (e.g. hot spot in combustion chamber).
POSSIBLE CAUSE
•  Air suction at intake-air system
•  Poor fuel quality
•  Inadequate fuel pressure
•  Pressure regulator (integrated in fuel pump unit) malfunction
•  Fuel pump relay stuck closed
•  Fuel injector malfunction (clogging, lack of injection amount)
•  Erratic signal from eccentric shaft position sensor
•  Improper ignition timing control (ECT, IAT, MAF and knock signals to PCM)
•  Incorrect spark plug heat range
•  Improper operation of eccentric shaft bypass valve
•  Engine overheating due to cooling system malfunction
•  Excessive carbon is built up in combustion chamber
•  Inadequate engine compression
―  Engine internal malfunction
―  Abnormal engine oil condition (viscosity, deterioration)
―  Low oil pressure
―  Excessive fuel pressure
―  Air mixed in oil malfunction
―  Metering oil pump malfunction
•  Leakage or clogging in oil pipe
•  Leakage or clogging in oil nozzle
Warning
The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:
•  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 injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.
Caution
•  Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean 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 air suction between the MAF sensor and intake-port.
Is there any air suction?
Yes
Repair or replace the air suction at the intake-air system.
No
Go to the next step.
2
Connect the M-MDS to the DLC-2.
Access the ECT PID.
Verify that the ECT PID is less than 116°C {241°F} during driving.
Is the ECT PID less than the specification?
Yes
Go to the next step.
No
Inspect the cooling system for the cause of overheating.
3
Connect the M-MDS to the DLC-2.
Access the IAT and the MAF PIDs.
Monitor each PID.
(See PCM INSPECTION [13B-MSP].)
Are PIDs normal?
Yes
Go to the next step.
No
IAT PID: Inspect IAT sensor.
(See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [13B-MSP].)
MAF PID: Inspect MAF sensor.
(See MASS AIR FLOW (MAF) SENSOR INSPECTION [13B-MSP].)
4
Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position (Engine off).
Are there any DTCs displayed?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [13B-MSP].)
No
Go to the next step.
5
Perform the fuel pump speed control operation inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].)
Does the fuel pump speed control operate properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts, according to the fuel pump speed control operation inspection results.
6
Is the strong blue spark visible at each disconnected high-tension lead while cranking the engine?
Yes
Inspect for the following:
•  Spark plugs malfunction
•  Spark plugs heat range
•  Pulse wheel damaged on eccentric shaft
•  Open or short circuit on eccentric shaft position sensor
•  Open or short circuit between eccentric shaft position sensor and PCM terminal 2AG and 2AP
If they are normal, go to the next step.
No
Inspect for the following:
•  High-tension leads
•  Ignition coils or connectors
7
Inspect the KS.
(See KNOCK SENSOR (KS) INSPECTION [13B-MSP].)
Is the KS normal?
Yes
Go to the next step.
No
Replace the KS.
(See KNOCK SENSOR (KS) REMOVAL/INSTALLATION [13B-MSP].)
8
Inspect the engine compression.
(See COMPRESSION INSPECTION [13B-MSP].)
Is it normal?
Yes
Go to Step 14.
No
Go to the next step.
9
Perform the metering oil pump control inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].)
Does the metering oil pump control operate properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
After that overhaul or replace the engine.
10
Check the engine oil condition.
Is the engine oil low viscosity and/or is there a gasoline odor?
Yes
Replace the engine oil.
After that overhaul or replace the engine.
No
Go to the next step.
11
Inspect the oil pressure.
(See COMPRESSION INSPECTION [13B-MSP].)
Is the oil pressure within the specification?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
After that overhaul or replace the engine.
12
Turn the ignition switch off.
Disconnect the fuel line quick release connector and install the fuel gauge to the fuel line.
Start the engine and run it at idle.
Measure the fuel line pressure at idle.
Is the fuel line pressure correct at idle?
(See FUEL LINE PRESSURE INSPECTION [13B-MSP].)
Yes
Go to the next step.
No
Replace the fuel pump unit.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [13B-MSP].)
After that overhaul or replace the engine.
13
Check the oil pipe between the metering oil pump and the metering oil nozzle.
Is there any air and/or clogging in the oil pipe?
Yes
Inspect and repair for leakage and/or clogging in the oil passage at the engine.
After that overhaul or replace the engine.
No
Overhaul or replace the engine.
14
Disconnect the fuel line quick release connector and install the fuel gauge to the fuel line.
Start the engine and run it at idle.
Measure the fuel line pressure at idle.
Is the fuel line pressure correct at idle?
(See FUEL LINE PRESSURE INSPECTION [13B-MSP].)
Yes
Go to the next step.
No
Zero or low:
Inspect the fuel pump relay and the fuel pump circuit.
Inspect for clogged fuel line.
If normal, replace the fuel pump unit.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [13B-MSP].)
High:
Replace the fuel pump unit.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [13B-MSP].)
15
Perform the fuel injector operation inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].)
Does the fuel injector operate properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts, according to the fuel injector operation inspection results.
16
Inspect the ignition timing.
(See ENGINE TUNE-UP [13B-MSP].)
Does the ignition timing operate properly?
Yes
Inspect the eccentric bypass valve operation and carbon build-up in the combustion chamber.
No
Repair or replace the malfunctioning parts, according to the ignition timing inspection results.
17
•  Verify test results.
―  If normal, return to the diagnostic index to service any additional symptoms.
―  If the malfunction remains, inspect the related Service Bulletins and/or the On-line Repair Information and perform the repair or diagnosis.