Injectors Tips

7/31/2019 Injectors Tips

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6.0 POWERSTROKE INJECTORS TIPS

Low fuel pressure can kill injectors.



INJECTOR REMOVAL

Injector removal

requires valve coverremoval

Valve cover gasket is

reusable

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INJECTOR WIRES

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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



INJECTORS

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Located between valves under valve cover





MEASURE VOLTAGE

10

40.17VOLTS

.78



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NEW INJECTORS

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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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OHM CHECK INJECTOR

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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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IDS Ford lap top scan tool can perform a

cylinder power balance graph Power balance graph can help pick out bad

injectors

Mass fuel desired test

Relative compression test

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Documents

Injectors Tips