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Troubleshooting
Problem
Engine misfiring or runs
irregularly
Lack of engine power
Engine idles poorly
Excessive fuel consumption
24
Cause
Poor fuel quality; incorrect fuel/dirty fuel.
Restricted fuel filter.
Water, dirt, or air in fuel system.
Low coolant temperature.
Dirty or faulty fuel injectors.
Electronic fuel system problem.
Electronic control system problem or basic
engine problem.
Restricted air intake.
Restricted exhaust.
Poor fuel quality.
Restricted fuel filter.
Engine overloaded.
Incorrect crankcase oil.
Low coolant temperature.
Incorrect valve clearance.
Dirty or faulty fuel injectors.
Air leak in engine intake or exhaust mani-
fold.
Engine is in derate due to DTC.
Electronic control system problem or basic
engine problem.
Poor fuel quality.
Electronic control system problem or basic
engine problem.
Engine overloaded.
Restricted or dirty air cleaner.
Insufficient compression.
Leaks in fuel supply system.
Poor fuel quality/improper type of fuel.
Incorrect valve clearance.
Dirty or faulty fuel injectors.
Electronic fuel system failure.
Electronic control system problem or basic
engine problem.
Low engine temperature.
Solution
Test fuel, drain water from fuel bowl.
Replace fuel filter element.
Drain, flush, fill, and purge fuel system.
Remove and check thermostat.
Contact a GMP ASD.
Service air cleaner.
Check and correct exhaust restriction.
Drain fuel and replace with proper
grade and quality of fuel for operating
condition.
Replace fuel filter elements.
Reduce engine load.
Drain crankcase oil and replace with
correct viscosity oil. See
Refilling the
Oil.
Remove and check thermostat.
Adjust valve clearance or contact a
GMP ASD.
Contact a GMP ASD.
Check intake and exhaust manifold
gaskets and manifolds; repair as
required or contact a GMP ASD.
Contact a GMP ASD.
Drain fuel and replace with proper
grade and quality of fuel for operating
condition.
Contact a GMP ASD.
Reduce engine load.
Replace air cleaner element as
required.
Determine cause of low compression
and repair as required.
Locate source of leak and repair as
required.
Drain fuel and replace with proper
grade and quality of fuel for operating
condition.
Adjust valve clearance or contact a
GMP ASD.
Contact a GMP ASD.
Remove and check thermostat(s).
Owner's Manual for Indirect Fired Heater
Draining and
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