Hi we after not even 1 tank of fuel I have had another Injector go bad sticking open this is the 2nd one in2 weeks what causes them to do that?I amrunning ceeteen boos from ford any clues to what I may be doing wrong?

 

How is your fuel pressure?

 

I'll secound the question...what is your fuel pressure? Could be a couple of other things...but I'd check the fuel pressure first.

 

I have no idea I have taken it to a Ford dealership for them to fix it all I got from them is another injector stuck open surely they would check that wouldnt they it being the 2nd injector gone bad but I will ask them tomorrow.Thanks and God Bless!!!

 

My second question was going to be, are you sure they replaced the correct one last time. Sometimes errors are made in identifying which one is bad. But since a dealer did the work, we'll have to assume their high end equipment did its job.

Low fuel pressure will kill injectors. And I don't think you can assume they checked it, especially with the engine under high load.

But in the end it could just be bad luck coincidence. And it is not unusual for more than one to go bad in a short time frame. This is why many of us choose to replace an entire bank of injectors. Particularly since the labor to get to them costs more than a single injector. If the injector you are having problems with now is on the same side as the last one, you should consider doing it and the other two remaining at the same time.

Odd cylinders are on the passenger side, even cylinders on the drivers side.

 

I ask them if Low fuel pressure would cause this and they told me no but I will have them check it tomorrow.and the 1st was #5 and this one was #2 or 3 I cant remberer but why they got it tore down im going to get a price on the other 2 installed if it was the #3.how hard are they to install when you already have it tore down? thanks for all the help this is my 1st diesel truck and this is all new to me thanks everyone and God Bless!!

 

I'm going to cry foul, low fuel pressure will damage the internals of the injectors. Now, cracked tips...which would leak excess fuel into the cylinders...I have my doubts. In six months time I cracked two of them...but they were 100k mile injectors and the early '03 style that were as tough as the newer designed version. My fuel pressure was in the 62-65 psi range the entire time.Very easy, maybe an extra 10 minutes per injector? Once your to the point that you can remove one...any of the others on the same side are right there. Just a matter of pulling the wiring plug out of the rocker box and unscrewing the hold down clamp. It takes longer to get to one injector than it does to replace all of them on one side. Or at least it has been my experience. Welcome to the diesel word, over time it will all make since.

 

ok it was the #3 injector this time so I called them and told them while they had it tore down to change the #1 and #7 also and I would pay for them the cost was about 480.00 the !st time was about 800.00 and this time was about 800.00 the dealer took care of both.I will have them check the fuel pressure also what should it be when idling and driving?

 

The only thing that would make me wonder about how well of a job that they would do is that they said low fuel pressure wouldn't cause an injector to go bad. Now, I don't know if that was just the service guy that told you that or if it was the tech working on it. If it was the service can, then I could somewhat explain that away (still doesn't make me feel comfortable mind you, but I could explain it away a little bit easier), if it was the tech, then I really have my doubts about them.

 

The Injectors have about 135 thousand miles on them if that matters?All I know is that when im driving it the injector hangs open and fills the Cylinder full of fuel and the motor stops and will not start back and Im down where it sits. so now with all on the odd side being changed now I hope it makes it to Myrtle Beach and Back pulling a 40ft 5th wheel. All I can do Is pray and ask God to watch over us!!

 

I will have them check the fuel pressure also what should it be when idling and driving?

 

As I recall, anything below 45psi at any time is a reason for concern. In fact Ford increased the regulator pressure a couple of years ago, with an updated kit that we commonly call the Blue Spring kit. That increases the FP to around 60-65psi at idle. Obviously Ford thought that low FP was a reason for concern.

Instead of paying the dealer to check and diagnose the fuel pressure, you might just ask them how much they would charge to go ahead and install the Fuel Pressure Regulator rebuild kit. It will have the blue spring which is now standard.

 

Is the blue spring upgrade for the fuel pressure? I have been reading about it and even though I don't think I have low fuel pressure, I'm thinking about getting the upgrade. Is it worth it of I don't really need it? Will it hurt my MPG? Is it easy to install?

 

Yes, for fuel pressure. The pressure regulator is nothing but a dumb spring loaded spool, with no feedback. So of course springs weaken over time, and since there is no sensor, you won't know without adding a gauge. On top of that, I think Ford or International decided that the original pressure level was marginal, so they did an inline update to the rebuild kit.

Here is our best thread on the installation. Simple enough to do. It won't affect fuel mileage.
https://www.ford-trucks.com/forums/1...ue-spring.html