Had some issues with my '04 Excursion as lined out in this thread: https://www.ford-trucks.com/forums/1...diagnosed.html and now I need some advice.

The Ford dealer told me injectors 1, 3, 5, and 7 tested bad. The tech also told me #8 was "iffy" or "borderline" and may "come back" if the others were replaced. I want to do this right but at the same time I'm on a budget and am doing the work myself. FYI, I must have an early '04 since the valve cover said "2003" and it's early-model parts underneath. Obviously, I don't want to have to do the work to open up the driver's side but don't want to have new injectors crap out soon after replacing them. I did an oil change right before the diagnosis and used Rotella synthetic 5W-40 with the Archoil additive. Do you guys think it would be OK to try just the passenger side 4 and see if the combo of 4 new injectors plus the synthetic oil with Archoil will do the trick or should I bite the bullet(s) and buy 5 and do the work on the driver's side, too?

Thanks in advance. Got the passenger side torn down today to getting the valve cover off and, man, what a PITA it is to get the back bottom bolt out! I plan on getting the passenger side injectors out tomorrow.

 

You are not going to hurt anything by doing the passenger side only. I would also check your fuel pressure and out in the blue spring update for the fuel pressure reg. If I were going to take apart the other side I would do all 4 not just one. Have you considered taking the injectors apart and cleaning them? There is an excellent write up. In the tech section about fixing stiction. I am on my phone or I would try to link it. Did they check your Ficm as well?

 

As I posted in the original thread I linked, the FICM tested within spec. It was the fuel pump which caused the domino effect and I am replacing it and doing the blue spring upgrade at the same time before I fire it up. Replacing ALL EIGHT injectors? = $$$

 

I am far from a rich man and am dreading when I will need all eight myself. I would do the four in the side you have taken apart. See how it runs and either save or buy the others when you can. Unless it run like poo. They were all fuel starved and unless someone has changed them before all have the same amount of wear on them. You can do it cheap and possibly have to tear it back apart. Or do it right and not have to worry about it. This time of year for me means winter will be here and I don't enjoy wrenching in -0F weather so I would do them all plus standpipes, dummy plugs and not have to think about under the valve covers for awhile.