System Inspection

Visual Inspection

1. Visually/physically inspect for the following conditions
- Vacuum hoses in engine room for splits, kinks and improper installation
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning.
- Verify that the PCM ground connections are clean and properly tightened.
2. Check MAFS and ECTS for the following conditions:
- Contamination, deterioration, poor connection or damaged harness
- The MAF signal displayed on the scantool should increase as engine speed increases
- The engine coolant temperature displayed on the scantool should close to the actual coolant temperature.
3. Was a problem found in any of the above areas?






Timing Inspection

1. Set up an oscilloscope as follows :
Channel A (+): Signal terminal of the CMPS #1 (back probe), (-): ground
Channel B (+): Signal terminal of the CKPS (back probe), (-): ground
2. Start the engine and check for signal waveform compared with reference waveform as below.




1 There are 60 signals of CKPS (Including missing tooth) during the semi-cycle of CMPS #1.
2 There are 3-5 signals of CKPS between the switching point of CMPS #1 and the missing tooth of CKPS.
3. Is the signal waveform normal?






Ignition System Inspection

1. Spark Plug Cable & Ignition Coil Inspection
(1) Visually/physically inspect the spark plug cable and ignition coil related to the misfiring cylinder(s) for the following conditions
- Damage, cracks, carbon and flashover
- Poor connection or damaged harness
- Connected to the incorrect cylinders at the ignition coil and spark plug
(2) Measure the resistance of the spark plug cable related to the misfiring cylinder(s)

Specification : 5.6 kOhms/m ±20%


(3) Measure the resistance of the primary and secondary ignition coil related to the misfiring cylinder(s)

Specification : Primary Ignition Coil Resistance : 0.56-0.68 Ohms at 20 °C (68 °F)
Secondary Ignition Coil Resistance : 6-8 kOhms at 20 °C (68 °F)


(4) Was a problem found in any of the above areas?





2. Spark Plug Inspection
(1) Visually/physically inspect the spark plug related to the misfiring cylinder(s) for the following conditions
- Damaged insulation, Worn electrodes, Oil or fuel fouled, Loose terminals and cracks
- Check for electrode gap : 1.0-1.1 mm (0.039-0.043 in.)
- Check if the spark plug for the relevant cylinder is lighter in color than the other plugs.
(2) Was a problem found in any of the above areas?






Fuel System Inspection

1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage
(3) Inspect fuel pressure with normal idle status

Specification : 338-348 kPa (3.45-3.55 kg/cm2)


(4) Is fuel pressure within the specified value?










2. Fuel Pressure Hold Inspection
(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes


(2) Is fuel pressure within the specified value?











Engine Compression Test

1. Warm up the engine to normal operating temperature. Verify the battery must be at or near full charge.
2. With ignition "OFF", disconnect the ignition coil connectors and the spark plug cables
3. Install compression pressure gauge to the spark plug hole.
4. With wide open throttle by hand, cranking the engine and record the compression readings from all of the cylinders

Specification : Compression pressure : 1,283 kPa (13.0 kgf/cm2, 185 psi)
Minimum pressure : 1,135 kPa (11.5 kgf/cm2, 164 psi)
Difference between each cylinder : 100 kPa (1.0 kgf/cm2, 15 psi) or less


5. Is compression pressure within the specified value?