DAF CF85 Series Service Manual

DIAGNOSTICS
2-4
©
200416
CE engine fuel system
1
ΧΦ65/75/85 series
4
High-pressure pump or fuel lift pump delivery too
low
Check:
- the high-pressure pump
- the fuel lift pump
Fault in electrical components/wiring of:
- connectors
Check the electrical system
SYMPTOM: REDUCED POWER ABOVE A CERTAIN ENGINE SPEED
Possible cause Remedy
SYMPTOM: ENGINE SLUGGISH WHEN ACCELERATING OR UNDER HIGH LOAD
Possible cause Remedy
Internal fuel leak between fuel supply pipe(s) and
injector(s)
Check the quantity of return fuel
High-pressure pump or fuel lift pump delivery too
low
Check:
- the high-pressure pump
- the fuel lift pump
SYMPTOM: WHITE/BLUE SMOKE IS EMITTED
Possible cause Remedy
Poor fuel quality Drain fuel, flush fuel system, replace the fuel filters
and fill fuel tank with fuel
Air in fuel system Check for drawing in of air:
- via the suction pipe
Fuel fine filter/coarse filter clogged Replace fuel fine filter and clean the system
Injector(s) mechanically defective or clogged Replace the injectors
High-pressure pump or fuel lift pump delivery too
low
Check:
- the high-pressure pump
- the fuel lift pump
Fault in electrical components/wiring of:
- connectors
Check the electrical system
SYMPTOM: BLACK SMOKE IS EMITTED
Possible cause Remedy
Injector(s) mechanically defective or clogged Replace the injectors
SYMPTOM: ENGINE OVERHEATED
Possible cause Remedy
Poor fuel quality Drain fuel, flush fuel system, replace the fuel filters
and fill fuel tank with fuel
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DAF CF85 Series Specifications

General

Brand	DAF
Model	CF85 Series
Category	Trucks
Language	English