Quantcast Troubleshooting-continued - TM-5-2815-232-140642

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6. Alternator charge rate is not regular Deleted.
7. Alternator has noise Deleted.
8. Misfiring or running rough
Cause
Correction
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.
Air in fuel system.
Find the air leak in the fuel system and correct it.
If air is in the fuel system it will generally get in
on the suction side of the fuel transfer pump.
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