Those darn injectors

[SmartMax1]

At some point in this restoration I gotta tear off everything to get the intake off. Glad I can take pictures with my cell phone. Comes in handy for things like this.

 

[RonD]

Ford injectors rarely fail but thats not never, the coil inside can be tested with OHM meter, 13-20ohms is expected

If left sitting in the engine long enough they can get clogged up as gasoline evaporates and leaves behind a residue
You can use pressurized can of carb cleaner and 9volt battery to clean them
Loads of video how-tos on that

But you can also get them rebuilt for $20-$25 each, check for local shops in your area, or you can send them out to be rebuilt

 

[SmartMax1]

Rumor has it that JBWELD was used somewhere on a leak" . The moron that did this ended up sucking it into the number 5 injector. How he narrowed it down to this one is anybody's guess. Anyone that foolish wouldn't be smart enough to make that determination . Doesn't mean it cant be done. My solution...replace em all.

 

[RonD]

Test each new one with OHM meter, and if possible see if they "click" when 9v or 12v is applied, there is no polarity issue

New, now-a-days, just means NEVER TESTED, years ago it meant "tested and works" not any more

I have chased my tail a few times "trusting" that the new part worked out of the box, and it turned out it didn't, hasn't happened often, but you sure remember when it does, lol

 

[Curious Hound]

You might be able to get a set from the junk yard. They come in different sizes. Get some from a vehicle with the same engine. They are color coded for the size, though I think I read somewhere that the color code is not an absolute certainty. Verify part numbers.