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Originally Posted by turbojack
I think your right on the money. However understand YOU are better then I in reading and interpreting a wiring diagram, and understanding what the symbols actually mean (I have to look them up in a internet glossary).
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We need to decide at some point how water injection will play its part.
I suggest the follwoing list of priority (order of importance):
1) Replacing high octane fuel at "HOM" mode
2) What action to take under water fault conditions
3) Actively disable the HOM mode or allow the ECU to switch off the HOM
4) Lower the boost pressure to wastegate setting by the DDS3
Question:
The rate of injection is determined by the PSI-FI and how can we tell the PSI-FI that we are in HOM mode?
At present the DDS3 will not know when the water should be injected so it cannot flag a logical fault under these conditions - it will only report that water is flowing or not. We can put an interface circuit to tell the DDS3 and PSI-FI at the exactly the same time that HOM mode is activated.
Is there a spare input on the PSI-FI to that effect? Once we have extablished this, we can sail forward.