ok I have a 90 camaro with the 305 5-speed and it will not start when its cold, i have to crank it until the battery is almost dead
before it starts. When it warms up it runs and starts fine.
I have already changed plugs, wires, cap, rotor and coil.
It gets good fuel pressure and has good spark

 

Sounds like it doesn't know that it's cold...

Try a new coolant temp sensor.

 

i replaced the coolant sensor and the coolant temp switch when
i repaced the coolant fan

 

Which coolant temp sensor? I'm referring to the one for the ECM.

 

I had an msd coil on it and when i put the stock one back on it started fine thanks anyway