Explorer 19lb injector rebuild

[dieselfarmer]

I have a used set of explorer 19lb injectors - Ford part # F6VE-A5A - that I would like to rebuild and run with the explorer intake on a 5.0 motor. The rebuild kit only has two orings, plastic cap (for the lower side) and filter. Where can I buy the small oring that goes on the top of the injector? Is it not needed? See picture which shows the red circle - one injector doesn't have the small black oring and the other does. Thanks for any thoughts.

 

[Jdgephar]

That cap, two o-rings, and the filter is all I remember when I did mine, but mine were the older Mustang injectors. Is that black just the end on a filter?

 

[dieselfarmer]

That cap, two o-rings, and the filter is all I remember when I did mine, but mine were the older Mustang injectors. Is that black just the end on a filter?

The black o-ring at the top is not part of the filter. I am thinking that if the larger o-ring (blue color in the pics) seals into the fox mustang fuel rail that I might not need the smaller o-ring at the top. Attached are measurement pics of the smaller o-ring. I might install the injectors in the rail and the rail in the manifold, power up the fuel pump with pressure to the rail and see if there are any noticeable leaks - if there are no leaks, I probably won't try to find the small o-rings at the top. - unless someone convinces me otherwise!

 

[SpecialFred]

@dieselfarmer do you have a part# for the rebuild kit? I'm thinking about doing mine.

 

[dieselfarmer]

@dieselfarmer do you have a part# for the rebuild kit? I'm thinking about doing mine.

I don't off hand. I rebuilt them and had trouble with several. I ended up sending the injectors (after the rebuild kit was installed) to an injector shop and several of them were junk. Ended up being cheaper to buy re-maned injectors from a reputable shop that flow tested the injectors.

I would probably not mess with the rebuild kit unless you have a way to flow test them to make sure they are good.....but maybe others with more experience can chime in!

 

[ba123]

Yes, you have one o-ring on top and one on the bottom. That's it. There aren't two o-rings on the bottom or anything.

 

[ba123]

And if anyone finds themselves needing these o-rings, they are size -203 Viton o-rings.

 

[fordguy]

I sent mine off to Dr Injector, one stuck open on initial install, hydro locked and bent rod were the end result. Never again. Ordered OEM equivalents. Most people have good luck with used injectors, I am not that guy lol.

 

[bigmuddy]

I have sent some off to Dr. injector. Later I have rebuilt several using the kits.

For a home rebuild:
I dismantle the injectors, soak in carb cleaner type solution overnight at least.
Then take compressed air and blow them to dry.
Get an old harness pigtail and then cut off the pigtail or buy a pigtail.
Wire that pigtail to a 9 volt battery pigtail or simply press the leads to the battery, so the electricity will open/cycle the injector.
Then take carb/injector cleaner in a can with the tube and inject cleaner into the injector while opening with the battery. May need a helper to get this all connected or have them shoot the cleaner into the injector.
Repeat until the injector is blowing clean and appears to be cycling like it should.

You may find that you need repeated soaking and running thru the process before a really old fouled injector works correctly.
Sometimes, they just won't and you need to find another one.

Lastly, wear protective eye wear at least as you stand a good chance of getting cleaner shooting back at you and quite likely in your face, so be careful.

 

[ba123]

I've heard of people really messing up their injectors that way but maybe a 9v battery is low enough voltage to be ok. (injectors aren't meant to get one constant voltage--but I also heard they get hot and you can tell when to stop, so I'm not sure but just a warning).

I got this test kit I used to clean mine. Worked great for me. I knew mine didn't need to be rebuilt though. I've done the orings a couple times.

I sprayed carb cleaner through each injector for a few second using the pule selection #8, then went through them again a second round making sure all the spray patterns were perfect.

One thing to note before you do this is that if you soak them, that carb cleaner removes the black paint from the lower section of the injector as well.

https://www.amazon.com/dp/B0CD21RTSN/?tag=classicbroncos-20

In this kit, there is an attachment that fits our injectors. You hold the injector firmly in place, hit the button to start the pulsing, and push onto the top of the carb cleaner can into the attachment at the same time.

I tested each injector before the carb cleaner step to know if it was operational.

I did this with two sets and the other set had a couple that were stuck and I was able to get them unstuck.

 

[73azbronco]

I don't off hand. I rebuilt them and had trouble with several. I ended up sending the injectors (after the rebuild kit was installed) to an injector shop and several of them were junk. Ended up being cheaper to buy re-maned injectors from a reputable shop that flow tested the injectors.

I would probably not mess with the rebuild kit unless you have a way to flow test them to make sure they are good.....but maybe others with more experience can chime in!

This, cheaper easier and tested, buy reman, or drop dime and buy new ford quality equivalent.

 

[SpecialFred]

Thanks for the insight. I'm gonna snag some remans. Hopefully this solves my crank no start issue.

 

[ba123]

Something to consider...I did notice this ebay seller has really good reviews for the aftermarket new injectors they sell.

I have no idea but I was looking at one point and thought about trying if I couldn't get either of the sets I have to work properly.

https://www.ebay.com/itm/4041688941...d=link&campid=5335857059&toolid=20001&mkevt=1

I don't know what a reman set goes for but just a thought.

 

[bigmuddy]

I've heard of people really messing up their injectors that way but maybe a 9v battery is low enough voltage to be ok. (injectors aren't meant to get one constant voltage--but I also heard they get hot and you can tell when to stop, so I'm not sure but just a warning).

I got this test kit I used to clean mine. Worked great for me. I knew mine didn't need to be rebuilt though. I've done the orings a couple times.

I sprayed carb cleaner through each injector for a few second using the pule selection #8, then went through them again a second round making sure all the spray patterns were perfect.

One thing to note before you do this is that if you soak them, that carb cleaner removes the black paint from the lower section of the injector as well.

https://www.amazon.com/dp/B0CD21RTSN/?tag=classicbroncos-20

In this kit, there is an attachment that fits our injectors. You hold the injector firmly in place, hit the button to start the pulsing, and push onto the top of the carb cleaner can into the attachment at the same time.

I tested each injector before the carb cleaner step to know if it was operational.

I did this with two sets and the other set had a couple that were stuck and I was able to get them unstuck.

Nice Amazon find! Do you think that unit pulses the injector using a 9 volt battery or ??

 

[ba123]

It works great and you can select the pulse rate. It uses battery power and you can connect to your battery. I didn’t like that idea so just used a plug in adapter I have to convert to 12v DC.