Mike,
A few easy ideas:
1) Put a volt meter across your battery and see what the voltage is when cranking. I’m not sure what the minimum voltage would be here but seems like a logical first step.
2) If you have a simple way to put a fuel presssure gauge on your fuel system somewhere - check to see if you’re pressure is low. Also be sure the pump is cycling to pre-charge the fuel system when you turn the key to the on position.
3) Did you make any changes before you noticed the issues that may be a factor?
?
Good luck!
-Kevin
Hollister,CA
Kevin Jakey