[lvsqcsl]

Hello all,
The Superduty truck in my signature has injector problems. I had it at the dealership for an unrelated problem and was told the #8 injector is throwing all kinds of codes. It is also very sluggish when the engine is cold. It is almost undriveable.


I recently viewed a video on you tube that showed a technician replacing the injectors and it didn't look all that hard. During the video, the tech mentioned that the fuel pump caused the failure of the injectors.


Here is my question: How would a fuel pump cause injector failure? Also, would it be prudent for me to replace mine? Thanks for your replies. Craig.

 

[tlottman]

One of the experts will chime in soon I am sure, but first thing that they will probably say is fuel pressure is dropping off causing your injectors to fail. Do a fuel pressure test and if it drops off you will probably want to do the blue spring upgrade which is well documented in the posts.

 

[lvsqcsl]

One of the experts will chime in soon I am sure, but first thing that they will probably say is fuel pressure is dropping off causing your injectors to fail. Do a fuel pressure test and if it drops off you will probably want to do the blue spring upgrade which is well documented in the posts.

I don't know what that is. I'll need to do some research. Thanks for your reply, Craig.

 

[shoguy89]

The injectors are lubricated by diesel fuel. That's another reason I don't like the piss-water that our government forces us to run. That said, if you've got a fuel pressure issue, it's pretty rough on the injectors.

It's not terribly difficult to replace the injectors, but it does require some specialized tools and good bit of knowledge. It's pretty easy to do it wrong.

That said, if you're interested, give us a call. We have injector kits and any other parts you might need.

 

[lvsqcsl]

The injectors are lubricated by diesel fuel. That's another reason I don't like the piss-water that our government forces us to run. That said, if you've got a fuel pressure issue, it's pretty rough on the injectors.

It's not terribly difficult to replace the injectors, but it does require some specialized tools and good bit of knowledge. It's pretty easy to do it wrong.

That said, if you're interested, give us a call. We have injector kits and any other parts you might need.

First of all, thanks for your reply. Second, just what is this blue spring deal? Third, should I replace my fuel pump after I replace all of these injectors? I apparently will need to test the fuel pressure. As far as the "piss-water" you speak of, I presume nothing can be done about that. I don't recall seeing any specialized tools in the You Tube video. Just a neat beeping torque wrench is all I saw. It looks like a bit of "wrench swinging" though. I think I can do it. Craig.

 

[jimmy]

Has your FICM failed and has been repaired? If not I would recommend FICMFixer service it. The spool valves that control injector operation get some bore wear and get harder to move. The FICM having a stronger solenoid driving control signal can overcome some of the spool valve drag. FICM's have a failure rate with time of nearly 100% so getting it repaired for it solder joint issues and having some of the circuit components upgraded to make it control signal better is not a waste and may take care of the injector problem. Low power when cold is a symptom of FICM problems as well as injector problems.

 

[lvsqcsl]

Has your FICM failed and has been repaired? If not I would recommend FICMFixer service it. The spool valves that control injector operation get some bore wear and get harder to move. The FICM having a stronger solenoid driving control signal can overcome some of the spool valve drag. FICM's have a failure rate with time of nearly 100% so getting it repaired for it solder joint issues and having some of the circuit components upgraded to make it control signal better is not a waste and may take care of the injector problem. Low power when cold is a symptom of FICM problems as well as injector problems.

Yes, it has failed and yes, it has been replaced. I had the dealership do the repairs and I would bet they just replaced the FICM with what was there before. I don't think it has this "stronger solenoid driving signal" that you speaking. The injectors have problems already; the dealership stated #8 is throwing all kinds of codes. I elected not to replace it because they wanted $1500.00 and I think I may do it myself, I don't know. Thanks for your reply, Craig.

 

[shoguy89]

As far as the "piss-water" you speak of, I presume nothing can be done about that. Craig.

Yeah, our government forced the car companies to put all this emissions crap on our trucks, then the forced the oil companies to strip out more sulfur from the diesel fuel. The result is less power and less lubrication. The only thing that can be done is to add the lubricity back into the fuel as you buy it.

 

[Ford06]

The Blue Spring Upgrade is the common name for the fuel pressure regulator rebuild kit that has a stronger spring in it. The stronger spring is colored blue, hence th name. It increases the fuel pressure to the injectors, as the factory spring gets fatigued and loses pressure. It is an easy upgrade and in only @$35 -$65 depending on where you get it.

 

[lvsqcsl]

Yeah, our government forced the car companies to put all this emissions crap on our trucks, then the forced the oil companies to strip out more sulfur from the diesel fuel. The result is less power and less lubrication. The only thing that can be done is to add the lubricity back into the fuel as you buy it.

I've been told the 7.3 doesn't have many problems due to the fact it has no emissions controls. This sulfur, I take it, provided the lubrication properties missing. Thanks for your reply, Craig.