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Old 07-31-2007, 10:44 AM
Senior Member
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Join Date: Dec 2001
Location: North Idaho/Eastern WA
Vehicle: 1997 Ford F150
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How do you replace fuel injectors?

What is the procedure for removing and replacing fuel injectors?

My SCed '97 4.6L is about to enjoy a (hopefully) significant boost in performance when I receive the 90mm MAF, 42# injectors and custom tuned XCal2 from Troyer in a couple days. I just don't have a clue how to change out the injectors.
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Old 07-31-2007, 11:26 AM
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Not much to really - disconnect the battery , take the TB cover off, take off the intake,disconnect the electrical connectors unbolt the the fuel rail, bleed the pressure via schrader valve on the rail, lay some rags/paper towel around the injectors to catch residual fuel - pull the rail.

Pull the injectors that stick in the rail out , just pull them , there held in with and o-ring.

Now when you pull the injectors , make sure you have all the hats - sometimes the hats will come off and stick in the manifold.

Revers order for install.

Good Luck
Windsor Built 5.4L, E40D, Transgo kit, 9.75 Rear gear, Brembo rotors, Carquest Blue's, Bilstein's, Ported & Polished Intake/TB, Denso Iridium's, Pace setter LTH's, Magnaflow HFC's, Magnaflow 20X9X2.5 HF Muffler, Type 3 19lb Injectors, Volant Intake w/Amsoil EEA191 Filter, 265/17 GY Fortera's.

Compression Testing Procedure
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Old 07-31-2007, 11:31 AM
JMC JMC is offline
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A little bit of engine oil on the injector O rings help the injectors slide back into place a lot easier.

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Old 07-31-2007, 11:43 AM
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XLNT! Thanks!!
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Old 07-31-2007, 11:43 AM


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