If this is happenning only when engine is cold, and its cold outside, it is normal, to some extent.
I have the same problem now that weather is down below 50 degrees. No problem when air is warmer. No air leaks in fuel filter base, fuel pump is strong.
I cycle the gp's, crank and it starts runs a little then dies. I cycle gp's again and usually 2nd time it starts and continues to run.
You didn't mention if you the problem when engine is cold or hot.
I am planning to replace GP's when i can in the next month or so, or if it gets worse. The M1009 is not a daily driver, so not that urgent.