2004 jeep grand cherokee 4.0 get up in the am starts up and runs great for awhile then stalls and shuts off sometimes it starts right back up but other times just turns over like its not getting fuel. Changed fuel pump, filter and relay still doing the same thing. So I OHMs checked coil pack and it zeroed out, also checked power going to coils and the voltage was good. WHAT CAN IT BE PLZ HELP!!!!

crank position sensor can cause different issues like this and seems like the most common fix for intermittent no start and random misfire issues. Search this forum good info on it. It's not easy to change and want to use Mopar sensor are the two main things to note.

Any other symptoms when it won’t work? Gauges working? Does the fuel pump prime when it won’t start?

When reading resistance, a reading of zero indicates a short Do you mean it read nothing ?

Why did you change fuel pump?
>> What is fuel pressure with new pump? try a leak down test KOEO.
What codes is the system showing if any?

Plugs - how do they look ? Wet, Dry, Black, Tan - wrong plug, damaged plug?

The CKP is a suspect for intermittent cutting out - be sure to use a jeep OEM part, its a PIA and aftermarket parts are problematic.