Ok..... I tested the FICM and this is what I got

KOEO 48.8v
Buzz test (switching from ignition off to ignition on) the meter read 26.88v, 25.7v, 0.0v, then 48.8v
Cranking voltage never moved from 48.8v.

Is this my problem?

Thanks, Andy

 

Do your five test again to be sure. But yes it is weak if those numbers are right.

 

I did it three times, consecutively. I shall do it once more, now

 

Key off to key on, 27.89v this time, then it momentarily read 0.0v then when ignition on 48.8v.

 

Anything under 45V at any time is a malfunctioning FICM.

 

Thanks. Probably a stupid question but would that definitely cause the low boost problem I am experiencing?

 

No, it won't DEFINITELY cause low boost, but it's definitely a problem. Fuel and boost are related things so it's hard to define.

And FWIW, there are no stupid questions. We all had to learn somewhere.

 

You can only fix one thing at a time, start with easy and knowen issues then work up.
If you check ficm voltage at 2000 rpm you may find it low volting there as well.

The ficm controls the injectors, poor injector performance will kill boost.

 

Thanks all, that makes logical sense. Does anyone know anywhere in Spain or UK that repairs them?

 

Yikes. No idea.lol. that's a tough one.

 

If you or someone you know is handy with a soldering iron you can possibly do it yourself. Many times the components are still in specification and just need to be reconnected to the circuit board.

Detailed FICM repair procedure:
https://www.ford-trucks.com/forums/9...procedure.html

 

Wow! Thanks, Nothing to lose there or is there? If I try myself, would I then still be able to send it off for repair?

 

I agree with Rusty, you can do it yourself.

You seem like a very knowledgeable person who understands how to repair things.

Google how to solder on circuit boards to get a good idea of what to expect and how to do it. Take your time. I would suggest a magnification light so you can see what your doing.

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The only risk is if you damage the circuit board or loose a component.

There are other alternatives to a repair but they are pricey, and in your case may take a while to get.

http://www.bulletproofdiesel.com/Bul...icmupgrade.htm

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Cheers. I have done some soldering before.. I am going to give it a go. Just struggling to get the last bolt out lol. I'm having a little rest