Kohler KG2204, Сервисная инструкция

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TP-6903 5/16a Fuel System Troubleshooting 49
3.3. No Start
Definition:
The engine cranks but does not start.
Figure 3-5 No Start Troubleshooting
Checks Action
Preliminary Checks None
ECM Checks

Use Spectrum to :
o
Check for proper communication with the ECM
o
Check battery power, ignition power and ground circuits to the ECM.
Sensor Checks

Check the TMAP sensor.

Check the crankshaft position sensor for output (rpm). This can be verified by an RPM
signal on Spectrum.
Fuel System Checks
Note:
A closed gas supply valve will create a no start condition.

Verify proper operation of the shut-off solenoid valves.

Check for air intake system leakage around the fuel pressure regulator, air-fuel mixer
and throttle body.

Check for air intake system leakage at all connections between the air-fuel mixer and
throttle body on turbocharged engines.

Check the fuel system pressures.
Ignition System Checks

Check for the proper ignition voltage output.

Verify that the spark plugs are correct.

Check the spark plugs for the following conditions:
o
Wet plugs (oil fouling)
o
Cracks.
o
Wear.
o
Improper gap.
o
Burned electrodes.
o
Heavy deposits.

Check for bare or shorted ignition leads.

Check for loose ignition coil connections at the coil.
Engine Mechanical Checks

Check for the following:
o
Manifold vacuum leaks.
o
Air-fuel mixer vacuum leaks.
o
Charge air cooler leaks on turbocharged engines.
o
Engine vacuum leaks.
o
Improper valve timing.1
o
Low compression.
o
Improper valve clearance.
o
Worn rocker arms.
o
Broken or weak valve springs.
o
Worn camshaft lobes.
Exhaust System Checks

Check the exhaust system for a possible restriction:
o
Inspect the exhaust system for damaged or collapsed pipes.
o
Inspect the muffler for signs of heat distress or for possible internal failure.

Check that the turbocharger turbine and compressor blades do not rub or bind against
the turbocharger housing.