I had a similar issue with my 03 BA Xr6t. Took it too fraud they diagnosed dead pcm. I did as I suggested above and worked through all the earth and power feeds. Found a loose engine earth strap and a Loose pin in one of the BEM plugs. Fixed both those issues and the fault never came back

What is a BEM plug?

Thanks

Body Electronics Module. Located under the Icc behind the tissue box. Its part of the Can Bus coms circuit in these cars.

Usually a good place too start if your getting coms errors, but a bad earth/power feed will also cause coms errors and the connections can drop out as the voltage drops due to bad earth/power

Is there a DIY how to remove/get to it?

Thanks

http://www.fordxr6turbo.com/forum/index.php?app=core&module=search&do=search&fromMainBar=1

Have a look through these threads and the AV forum

Ecu's are become to fail in these cars, got another in the shop at the momment, my usual electronics people will not even reco them because they can not gaurantee them.

who u use for computers mick?? logicar?? there a bunch of useleess pricks

had a vito van here 3000rpm limit, been everywhere, went to merc dealer etc, not find problem

send computer to logicar comes back as tested ok, problem still there!!

send computer to injectronics in hallam they repaired it runs fine revs right out now!!

and that's only one example ive had from them

Are the ecu's failing because they sit in the engine bay where exposed to condensation and excessive heat and not behind the dash?

Apparantly they crack solder joints on the circuit board, they used to repair them, but then they would crack in another spot and buyers expecting warranty, so they have figured they do not want to deal with them anymore.

Thanks Ratter, Ecu is getting replaced tomorrow, so fingers crossed

No, it will idle perfect until you go to drive it.Thanks

yeah used to happen to me as soon as you put the foot on the gas it died. became very bad to drive on the road

Apparantly they crack solder joints on the circuit board, they used to repair them, but then they would crack in another spot and buyers expecting warranty, so they have figured they do not want to deal with them anymore.

sounds like xbox lol I found the ecu to be abit exposed to some other makes of cars. I know when I pulled one out a of ls1 ute was in the plastic box over it so nothing could leak or sit on it.