Thanks Mike, very much appreciatedxantia_v6 wrote:Try this
![Big Grin :D](./images/smilies/icon_e_biggrin.gif)
Moderator: RichardW
I've been thinking the same. As soon as I have time I'll disconnect the leakage returns from the electrovalves and see how much is coming out in soft mode. The valves, in theory at least, should only spurt a bit whilst changing modes. When in either hard or soft mode the leakage return is sealed.xantia_v6 wrote:BTW, I just have a feeling that there is a big red herring in the information we have so far... but I can't put my finger on it. I think it would be good to find a way to confirm that the HA valve leak rate is actually caused by the shorter waveform.
My next piece of reasearch. One telling difference between the Activa and the V6 is that the Activa has quite a tired battery whereas the V6 has a brand new one and all tests have been carried out with the ignition off on both cars. Maybe the mark:space ratio does change to compensate for battery voltage.xantia_v6 wrote: On the other hand, we don't have an explanation yet for the different waveforms.
Look at it this way Jim...CitroJim wrote:More tests carried out this evening...
I have been fighting a shoal of red herrings on this one![]()
Although I did not have a spare normal HA ECU I did have a good spare Activa HA ECU so thought I'd give it a try after looking at the relevant circuuit diagrams to check all wires went to the same place and did the same jobs on each ECU. They do but they're not directly interchangable; the normal ECU has white and black connectors whilst the Activa ECU has white and green connectors. The balck and green connectors have different indexing lugs which make them non-interchangable but if you carefully shave off the middle index lug on the green connector they can be swapped for test purposes.
Guess what.. Exactly the same fast tick rate and exactly the same wave formSo unless that ECU has exactly the same fault (very unlikely) it's something else.
I bit the bullet and disconnected the leakage returns from the electrovales and lo and behold they're both leaking like crazy in soft mode; enough to fill a litre jar with LHM in just a couple of minutesThey are literally running full-bore
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So, that's it. I have two duff electrovalves![]()
I must now save my pennies for two nice shiny new ones![]()
My apologies for creating a long thread out of a red herring. I fell into the trap of trying to look for an electronic problem as I just could not believe that both valves could be faulty.
You learn something new every day with these cars