injectors tips
TRANSCRIPT
7/31/2019 Injectors Tips
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6.0 POWERSTROKE INJECTORS TIPS
Low fuel pressure can kill injectors.
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INJECTOR REMOVAL
Injector removal
requires valve coverremoval
Valve cover gasket is
reusable
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INJECTOR WIRES
Injector wires pass
through aluminumrocker arm carrier
Make sure to position
connectors so you canreinstall retaining clips
easily
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INJECTORS
Generation 2 Siemens injectors
Top fed with oil
Oil is fed to injector through oil rail
Top of injector has a O-ring to seal oil rail to injector
O-ring can be damaged and cause high pressure oil leak Injector O- ring leak will result in misfire
Injector reseal kits are now available if you damage O-ring
Fuel enters toward bottom Has two coils to open and close injectors
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INJECTORS
Injectors operated by fuel control module
Use 48 volt pulse
4 wires to run spool valve both directions
Spool valve has two position – one position allows oil into injector
Other spool valve position shuts oil off and drains excess oil back to
crankcase Injectors use high pressure oil to activate
C clip at top of injector breaks causing O ring to get cut and highpressure oil leaks out causing no start
Injectors have a weep hole that tend to leak fuel into oil
Oil level gets full of diesel and wipes out turbo bushings
Replace all injectors
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RETAINING CLIPS
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Retaining clip
Retaining clips were installed at nine O'clock position
Easier removal and installation if moved to 12 O’clock
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INJECTORS
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Located between valves under valve cover
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MEASURE VOLTAGE
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40.17VOLTS
.78
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#40 TORX BIT LONG NEEDED TO REMOVE INJECTOR
HOLD DOWN BOLTS
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INJECTORS
Injector removal – As
you loosen torx bolt thehold down forces
injector out of bore
making removal easier During installation
torque injector a little
beyond spec and make
multiple passes
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BAD O RING FUEL SIDE OF THINGS
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Engine oil dilution –Possible damage to Turbo
Suspect bad injector- Drain engine oil and leave oil drain plug out
Unhook one fuel outlet line at fuel filter housing
Plug hole at housing and energize fuel pump
Watch for fuel coming out of oil pan
If that head passes hook up other head’s injector lineand watch for fuel from oil pan
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INJECTORS
Cold start running problem has been an
injector issue usually clears up in less than oneminute
Reflashes available to help in cold start running
problems
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