Nilfisk-Advance Advance Retriever 2060 Service Manual page 155

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NO
See pump
diagnosis
Repair
wiring or
voltage
source
NO
NO
12V at
injector?
YES
Check
ground or
replace ECU
YES
Replace
injector or
o-rings
NO
Unhook inj. &
crank for 15 sec
to unflood
ZENITH FUEL SYSTEMS,
NO
Fuel level ?
YES
Momentary
fuel pressure
when key is
on?
YES
NO
Fuel
pressure
w/ crank?
YES
Injector
light
flashes?
YES
NO
Injector
sprays?
YES
Injector
leaks?
NO
YES
Are plugs
fouled?
( Q J L Q H Z R Q · W V W D U W ² J D V R O L Q H
Add
fuel
Correct ignition
system.
repair or
replace ECU
YES
NO
Tach.
signal
to ECU?
NO
Fuel press
9 – 11 psi.?
YES
Adjust
Fuel pres.
9 – 11 psi.
Clean or
replace plugs
Repair
wiring or
CKP sensor
Replace
fuel press.
regulator
YES
16 psi
restricted
return line
NO
Replace fuel
filter and or
pump
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