Disco ACE oddity - Part II

Hi all,

My 2004 Disco's been in the garage about 4 times for this, they've spent many hours trying to fix it - now getting desperate and broke!

The story so far:
Amber ACE on almost all the time
Garage computer plug in showed a Directional Valve fault, so it was replaced
Amber ACE again
Computer linked up: Valve replaced still showing faulty and now another valve is also faulty! Maybe it's the ECU?
A second hand one was fitted to see if this was the case, it worked
A new ECU was ordered and fitted, but the Amber came up again, but no fault was recorded.
A different second hand one was fitted, again it worked.
Another new ECU was fitted, but again the Amber light came up, but no fault.
A second hand ECU was fitted, since this appeared to be the answer and worked, test drive was a success, but as soon as I'd picked it up and was a mile away the Amber came back on!
Back to the garage, plugged back in, the originally replaced valve was at fault.
A response test was run several times and reacted as it should, after this the computer tested the system twice and it passed!
Amber light off for all of about 10 feet! Now back home with car and a lighter wallet and have no idea what to do next!

NB: All secondhand ECU's have been from early Disco's as these seemed to work.

Any help would be great, thanks

why dont you just remove the ace and just put in normal anti roll bars?
\
Extreme 4x4 Ltd ANTI ROLL BAR UPGRADES & KITS

That is what i,m about to do to mine, i spent £168 on new seal for the valve block cos it leaks and it still b###y leaks so i,m ripping it all out.

It's well worth doing and you won't really notice any difference.

Hi there,

Does the car drive normally when the amber ACE light is on? Is this really a problem with ACE? These vehicles are very sensitive to voltage when it comes to reporting faults and also to earth leaks which is not suprising when they have a few kilometres of wiring in them by the look of it.

You may be spending money trying to fix an amber light warning rather than anything fundementally wrong with the ACE system.

Regards

Update (ooops, better late than never)

The final ECU in the list (first message) was a second hand part from a 1999 Disco costing £60+VAT from CWS, the light did come on, but over the months has come on less and less and now isn't on at all.

So it's considered a success. A very odd success as everything of it's correct build year didn't work at all. It's almost as though it's relearning - weird! But thank goodness all is working as it should now.

Thanks everyone for your help.