Lost Jumper Wire.
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2nd Gear
Joined: Jun 2026
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Lost Jumper Wire.
I have a 1999 F150 4.6 2v. I had to remove the heads to repair a broken spark plug. I replaced valve seals and timing chain while open. I also had to mill out two manifold studs and add helicoils. I installed 8 plug inserts. I am now putting it back together when I have the time. The only engine opening is the throttle body. I installed the intake today and tightened the valve covers. I cannot find the last injector connector. Is there a jumper? I did find a jumper for the left head temperature sensor. I cannot find the injector connector for the first or second injector on the left side (driver US). It has been about 8 weeks since I removed the heads and I have most screws labeled in zip loc bags. I am about an hour from starting if I could fine that injector connector.
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2nd Gear
Joined: Jun 2026
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I only see 3 injector connectors on the left side. I am calling #1 the cylinder near the radiator. It could be the one by the firewall that is missing . Yes, jumper is an extension. I only guessed #1 because the harness ends by the radiator.
Fleet Mechanic
Joined: Jun 2023
Posts: 1,399
Likes: 384
From: WA
My 2003 electrical diagrams show one power supply wire with only splices on the path to each injector. Then no splices on the way to the PCM. So no injector connectors on a 2003 have a jumper.
https://help.summitracing.com/knowle...HE-04978/en-us
https://help.summitracing.com/knowle...HE-04978/en-us
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