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All noted and very true what you are saying .
I was not happy with the recent tank having 15,8 l /100 km - had heart failure when I filled up .
With this I took the decision to roll back .
1-Removed direct Cone filter - back to airbox.
2-Undid the PCV delete and filters, back to standard PCV workings.
3-Removed O2 efie as batteries were soft .
4-Removed fuel heater .(cause of the high fuel use without ECU compensation .)
What I did find in my recent investigation with a CRP 123 monitoring the pulse length is that the increase in pulse lengths with different loads on engine at idle .
This included aircon
drive lights
fog lights and
bright lights .
Interesting how the pulse length increases as the load on the engine is increased .
On my vehicle with no - load in neutral the pulse length remains constant through the rpm range up to 3000rpm .
Loads play the important part of the whole fuel economy issue .
Without my being able to re-map , I have been trying to curve something is not possible .
My last 6,58 l /100 km was highway driving using 15-16 :1 AFR by manually adjusting the MAP offset .
Back to drawing board .
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