Solved! Bad CKPS. Very difficult to remove and replace, however seems to have solved the problem. The retaining plastic clip broke when removing, took about an hour to connect the pins. Thank you so much everyone for getting us back on the road!

 

Good news. Thanks for letting us all know.

 

I think i have this exact issue. P1884 code, repleced fuel pump. The fuel gauge is still off. I am about half full and the gauge says 75% full. That was the initiial thought around the fuel pump, the intermittenet running was the impetitus to install the pump after sitting in the box for months.

I have a CKPS in the trunk, just need to install it now.

It sort of ran, stumbled on starting fluid.
I have a newer battery, strong crank. But it makes sense to me that it would be the CKPS.

Will report back.