What to Check when it will not crank? - 1985 Chevrolet Spectrum

Cranking is starter motor action so is turning over. If it cranks good but won't start, have a helper crank it while you check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure. Also check for fuel injector pulse. Any applicable trouble codes?

You will need to replace the crank angle/position sensor near the crank pulley. A photo of the sensor is attached. The sensors wear out due to heat and cold cycles and internal corrosion.

MasterPro Ignition - Crankshaft Position Sensor Oreilly's Auto Parts part number is:
Line: MPI ' Part # 2-96054

Is it cranking?.....if it's cranking but not firing you'll need to check things like the fuel pump, (can you here it pumping) other things to check will be coils, spark plugs, leads, relays, crank sensor. If it's not cranking check battery voltage, key remote and immobiliser.

Make sure battery has a full charge. Cranking is starter motor action, meaning the starter motor is cranking the engine. If the starter motor won't crank the engine, then we need to test starter motor wiring circuits.
If it cranks good, but, won't start, have a helper crank it while you check for spark at the spark plugs, where applicable. If spark everywhere, use a gage and check proper fuel pressure and also, check for fuel injector pulse, engine cranking.
Can you check for applicable trouble codes?
I can only make suggestions, you have to do the testing. I give the same info to guys and gals, I don't know how to do it any other way.

could be clogged cat converter( check pressure before and after cat converter)
bad crank positioning sensor
bad fuel pump(check for fuel pressure}

the crank position sensor will never tell a vehicle to crank. the purpose of the crank position sensor is to detect misfires and also for engine timing. when a vehicle does not crank you need to look at starting system. check your battery, load test it. check for starter signal to starter solenoid from ignition switch.

You checked fuses and relays for electrical cranked window?
Remove: internal door handle, remove window crank if manual crank, door panel, remove film/paper seal.
If is mechanical crank: check for worn out parts on gearing and racks (reinstall crank and wind window up and down). Replace worn parts.

If electrical window crank: check for power at solenoid. Try switch again and watch to see if solenoid engages and tries to crank.
Check to see if switch is broken. Try door switch and drivers door switch.
Pickup another solenoid and replace old one.

Turning over & cranking is the same thing

Check for fuel pressure at motor with a gauge
when you turn the key on

Check for spark or injector pulse when cranking

If the motor won't turn at all, check relays & possible
bad starter,neutral sw,ignition sw

is it a clean crank or a lazy slow crank ?
if clean crank check to see if you get a spark or pulse at the injector
slow and lazy crank
double check the timing again
or check to see if you broke or left the crank angle sensor unplug
good luck