2003 225k miles. the HPOP went last year and the dealer did the repairs and also replaced the FICM. The truck has never run right since, no power and wont take any throttle until is completely warm. When I tested the voltage of the FICM it was 51 Key on engine off and 57 while running. HERE is the real question. My truck was built in 6/03 and it has a 4 pin FICM? Did the dealer install the wrong unit? Will a 4 pin FICM even work in my truck? HELP

 

The old 7 screw FICM was only used for a short time and is not serviceable as far as replacing the board so you're better off with the 4 screw. Yes the 4 screw is compatible in all 6.0s. I don't think a 7 screw is available at all anymore new.
When you say NO power, do mean it literally or is it now just not as responsive? The new FICM probably has the latest strategy in it which sucks compared to your old 03 one. A FICM tune is suppose to help alot.

 

Might want to replace your FICM power relay, especially, if you get the FICM upgraded.

Also, I thought my FICM was bad and it turned out to be the relay. Sent it to Ed and had the Ultimate Update and Atlas 80 tune put in. The X has never run better. The power and throttle response are amazing and fuel mileage increased from 12.5 to 16.5 MPG. Highly recommend!

Ed

 

When you say "Dealer" was it a Ford or not? The voltage is higher that expected.
I am betting that your going to say Non-Ford dealer. Did they change the oil at that time?
What was put in or is in it? I have a feeling that someone is trying to fix stiction issues with
a higher voltage FICM.

Do you have something that you can use to read live data? ICP,IPR,EOT,ECT,TFT both after start
and once warmed up.

Also the trans will change shift patterns once it warned up.
This is do to shift timing caused by the way that cold oil flows
through the solenoids.

Sean

6.0L Tech Folder

 

First off, let me give a shout-out to Yahiko for letting me know about this thread! Okay, on to the topic at hand...

Similar to what was mentioned already, having a 7 pin or a 4 pin unit doesn't actually make the difference - the software is what causes things to work or not. You can have a 7 pin unit placed in an 07, for example, with the 07 software and be just fine. You can also take a 4 pin unit and put it in an 03 and have it, too, work. It's all about the software.

That said, even WITH the wrong software, any Powerstroke-programmed FICM will start and run any other Powerstroke without issue other than throwing a U0306 soft code (that won't even illuminate the check engine light). So...even with the wrong Powerstroke software installed, you won't have any driveability issues, power issues, fuel economy issues, or really anything negative at all other than the characteristics that that particular software revision is known for (heat induction for cold weather starting ease, poor fuel economy and throttle response associated with the latest software revision, etc).

Your voltage readings, however, are a concern. Ford specs dictate that voltages be in the 45-50 volt range.

More than 50 volts is an indication that someone modified the voltage output of the unit beyond the stock parameters. This is a bad idea for any number of reasons (4. Do you provide a 58 voltage or other voltage modification?), but the short answer is that Ford dealerships don't provide voltage modded modules. My guess is that you received a 'rebuild' from a 3rd party.

Less than 45 volts means that the FICM has gone out.

If you have another 6.0 available, you could always pop this module in that truck to see if the issues follow the module.

Alternatively, you could ship that unit on over to our shop and we could run it through a complete diagnostic to let you know precisely where things stand.

So...we know you have bizarre voltage and a truck that runs badly. The question that remains is whether the FICM is responsible for the poorly running truck and now you have some options to help you figure that out for sure.

Hope this helps!

 

The only real difference I know of between the 4 pin and 7 pin. Is the 7 pin uses individual drivers and the 4 pin uses shared drivers between 2 cylinders.
It is from some old data so does this still apply? Just a software difference.


Hijack the thread just a little.