So my lmm has a issue that when coasting down hill at idle the rail pressure will creep up above desired. Done it ever since I went to a stroker pump when I was still 10mm and a old tuner we fixed the issue by adding more duty cycle to the FPR but now that I switched tuners again. And now a 12mm it still does it. Does anyone have any ideas? It’ll do it with the lift pump unplugged and it’s not from a restricted return issue
