replacing injector O-rings

[nickb123]

Ive had a fuel leak in my explorer the whole time ive owned it. One symptom of this is it takes a few extra cranks to start it and there is fuel on the passenger side on the intake, between the 2nd and 3rd injectors. I first notice the schrader valve had fuel bubbling up, I replaced that with a used part, so I think that's good. But it still leaks so it must be the injectors. My question is how much of a job is it to remove the upper intake plenum to access the fuel rail? Is this a one day job? Is there anything else I should replace while im in there? Im not going to drive it until I get the leak fixed, its not worth the risk of a fire. This is on a '99 5.0 V8.

Thanks

 

[Turdle]

You'll need to bust the egr tube nut loose. If you can do this without breaking the tube, you are 1/3 of the way there.
There are a lot of vacuum lines, so I would try to slide the upper to one side--cover the intake holes, and work on one bank of injectors at a time. You'll need to slide it back and forth to remove the fuel rail first though. It may be a bit tricky doing it this way.

Otherwise you need to label a lot of vacuum lines, and drain some coolant because there is a small coolant line going to the upper intake. Be sure to replace the plennum gasket also.

 

[imp]

Cracked fuel rail? I'd test it under pressure, off the vehicle, before assuming the leak originates at an injector. Unless you SEE the leak, of course! imp

 

[nickb123]

Cracked fuel rail? I'd test it under pressure, off the vehicle, before assuming the leak originates at an injector. Unless you SEE the leak, of course! imp

How would I go about pressure testing the fuel rail? I can't pit point the source of the leak, just see the damp areas. When it comes to removing the manifold, I don't mind labeling hoses and taking pictures. When it comes to the egr tube, where is it located and why are they prone to breaking?

 

[nickb123]

Does anyone have any links to directions on doing this job? More help would be great, Im going to attempt this job this weekend.