It won't crank...

If it's getting fire and fuel would suggest timing issue. Maybe check crank and cam sensors. Getting any check engine light?

How about the fuel pump...are you getting the fuel to the cylinders? Is the fuel making it through the fuel line through the fuel filter? Drop a few drops in 1 cylinder, if it fires, you have a fuel problem. Does it turn over? If not check out the motor starter!

What you are telling me is the engine is firing the plugs but not getting fuel.
When you changed the fuel pump and filter, did you check the fuel pressure at the rail ?
Are the injectors getting power and ground pulse ??

how much is the RPM showing in the datatlogger while cranking?

with a glass.. like a shot glass poor half a shot into the intake. have a fire extinguisher handy and try starting it if it tries to start could be fuel pump or fuel filter

ok, turning over and cranking are the same thing, what your saying is it won't fire, so , 2 things make a motor fire, electric and fuel, so starting with the easiest remedy , remove the distributor cap, and inspect the rotor and connection points that are inside the cap, check for any debris built up , sometimes you can clean them good enough to get the car to fire up, if it does , normally you would replace them , ( not that expensive) remove the number one cylinder spark plug, and once out put the spark plug wire back on it, ( your going to need help with this step) with insulated pliers , hold the plug and place the bottom of the plug against a grounding point (any bolt on the motor will do,, but try and keep it away from the carb as its Hopefully going to spark) have someone try and turn the car over as if to start it, look for spark at the end of the plug, if you have spark,, replace the plug and try and start the car , if it won't,, move onto the fuel problem, you need to make sure that the car is getting fuel, remove the fuel line to the carb turn the key for a second, you should see fuel splashing out, if yes ,, you should be able to start the car , if no,, check the fuel filter first , then the fuel pump,

There are two reasons a vehicle that cranks well won't start, it is either not getting fuel or not getting fire to the spark plugs. You'll need to determine which and go from there. If no fuel, change the fuel filter or check that the fuel pump is running. There could be a number of reasons if there is no spark but we'll need more info to provide a solution.

Sounds like you either:

1. Not getting fuel to the injectors remove the fuel line at the fuel filter and place end in an old can while someone cranks the engine. If fuel is pumping change the fuel filter and reattach fuel line If it starts GREAT, if not try #2
2. Have a weak spark so plugs are unable to fire. Check cable into and outof coil making sure there are no cracks and they seat firmly in the coil.

CHECK YOUR GLOW PLUGS, THEY WORK LIKE A SPARK BY WARMING SYSTEM FOR FIRING.