I agree you should see a misfire code but there isnt.? Yes number 1 & 5 plugs are sparking very well altho they are very wet. I have swapped them around with no difference, checked and double checked firing order and even tried swapping the 2 misfiring cylinders with no joy in desperation.
If compresion was at fault surely it should still burn the fuel??
I only have the vantage to test with no pico.
Thanks for all the thoughts and suggestions, i keep thinking there is something simple at fault but cant find what.
regards Brad