Nilfisk-Advance Advance Retriever 2060 Service Manual page 161

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Check MAP
sensor
connections
Adjust timing
or repair
harness / module
See engine service
manual
ZENITH FUEL SYSTEMS,
Check MAP
OK
sensor with
alternate sensor
Check for
Leaky injector
Fuel press.
Greater than
11 psi ?
NO
Ign. timing
Retarded ?
runs OK
( Q J L Q H U X Q V U L F K ² J D V R O L Q H
Check coolant and
OK
air temperature
sensor connection
OK
Check air/coolant
sensors resistance
Repair / replace
fuel return
OK
YES
Restriction
in fuel return
NO
NO
Press reg.
9 – 11 psi
YES NO
Replace fuel
pressure regulator
OK
as per chart
line
YES
line ?
Adjust
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