Working on a 2.5 just now that stalls easily setting off in first-high. Nanocom shows modulation up at 95% so I'm guessing the pump static timing needs a wee tweak?
Does that sound about right, or am I holding the wrong end of the stick?
I've seen mention online of people tweaking the pump position whilst watching nanocom, anyone tried that?
I just a few weeks ago swapped out my top and middle gaskets on the FIP and after asking Wammers on another forum (he is a retired mechanic and a serious FIP boffin - but he is cantankerous hahaha) the advice I got was this:-
Modulation is only adjustable via static timing and no other way. 95% is right at the end of the ability for the electronic brains to account for chain stretch and it will need the static timing adjusting sooner rather than later. My modulation is 67% but I will do static timing in the spring.
Twisting the pump only changes the mg/stroke (which is really mg/litre apparently) which should be between 5 - 6 mg/str for best running @ 750rpm, 128 is the correct fuelling value on Nanocom. To keep my rpm @ 750 I have to put my fuelling at 129 so you can adjust that. The dash rpm counter needle however shows around 775 on the dash, Nano shows 750rpm exactly, so I go with that.
If you haven't yet done it, the twisting and moving is a pain in the arse and will seriously test your patience! Slight tightening of one bolt revs go up, slight loosening of another and they drop, it's a balancing act it just takes time and cups of tea :) If you loosen the bolts too much if you don't spot it you will find a nice diesel smell, thats the pump pissing diesel out - so don't loosen them too much just enough to get movement.
I am in no way a guru I'm just passing on the same info that I was given so I hope this will help others as it did for me.
So correct measurements should be:
fuelling @ 128 on nanocom
modulation 50% (+/- 5%)
With new chains static timing is set at 0.95 mm lift at TDC. Over time as the chains run in and loosen up slightly it should drop to 0.9 mm static.