gforceman

I had 2 going bad injectors. On drivers bank I probed then while motor was running . They sound like there barly working. Not clicking a thump or double light click. Gonna replace the 4 on that bank. .. how long does it take for fuel system to depressure before removing rail..

otto457

Since you have an 05 and they have a history of sticking open I'd just replace all of them, but that's me. You can depressure the system by taking off the fuel filter if it needs changed too or just wait a few days. You're going to get some gas no matter what when you take them off so have towels at the ready. Oil the O rings going back in and you'll be good to go.

gforceman

Thanks Otto. I do wanna replace them all.. picking up the first 4 today. On bad side 2 weeks the other 4 .. I got Borg warners from O-Rileys. For 33 each. I called ford they wanted 65 each

Do u pull off rail with injectors attached or pull clips off first and pull rail leaving the injectors. And pull them one at a time

Deanjet

Question, I am new to the 04-08 F150 5.4L. Bought an 06 with 118,00 miles on it. How do I tell if the injectors are gong south??? I do have a mechanics stethoscope.

otto457

Only in 05 there was a bad batch. This is not a widespread 04-08 problem. You're probably safe. You should be able to hear them click open and shut.

primalurges

You can relieve pressure by pulling fuel pump fuse while engine is running. You should be able to wiggle free from manifold while they are on the fuel rail.

Dsherman

Also there isn't that much pressure there. Wear some goggles and disconnect and you'll get a spray of fuel, maybe three or four oz. I did it when I fixed my CHT sensor.