Quantcast Troubleshooting-continued - TM-5-2815-232-140643

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Troubleshooting
8. Misfiring or running rough (cont'd)
Cause
Correction
Leak or break in fuel line between fuel
Install a new fuel line.
manifold and cylinder head.
Wrong valve clearance.
Make adjustment.
Wrong fuel injection timing.
Make adjustment to timing.
9. Not enough power
Cause
Correction
Bad quality fuel.
Remove the fuel from the fuel tank.  Install a
new fuel filter element.  Put a good grade of
clean fuel in the fuel tank.
Fuel pressure is low.
Make sure there is fuel in the fuel tank. Look for
leaks or bad bends in the fuel line between fuel
tank and fuel transfer pump. Look for air in the
fuel system, sticking, binding or defective fuel
control valve. Check fuel pressure. The outlet
pressure of the fuel transfer pump must be a
minimum of 140 kPa (20 psi) at full load speed.
If fuel pressure is lower than the above pressure,
install a new fuel filter element. If fuel pressure
is still low, check the fuel transfer pump.
Leaks in air inlet system.
Check the pressure in the air intake manifold.
Look for restrictions in the air cleaner.
Governor linkage.
Make adjustment to get full travel of linkage.
Install new parts for those that have damage or
defects.
Wrong valve clearance.
Make adjustment.
Wrong fuel injection timing.
Make adjustment to timing.
Power setting too low.
Make an adjustment of the power setting to
specifications shown on the engine information
plate.
Turbocharger has carbon deposit.
Inspect and repair turbocharger as necessary.
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