Check for spark (pull plug 1 and put in lead and lay on engine block, then kick over, watch for spark).
If no spark, check points and rotor button/cap, scrape cointacts in distributor cap and rotor button if dirty.
If spark, replace plug, must be fuel delivery. If carby has window on float bowl (remove air filter and check) look to see if the fuel level is up to the line/dot on the window.
Otherwise, look down top of carby and pump accel lever once, watch for spray of fuel from accelerator jet, you may have to hold choke plate back to see it.
If no fuel in bowl/spray from accel pump, remove fuel fitting from carby, and place into bowl, turn over and check for fuel pumping.
If no fuel, it's pump, should be on motor, on side of head, driven from the camshaft, follow fuel line back.
If pumped fuel, then could be needle/seat in carby blocked, or jets in carb. Need to pull down and clean carby.
I would check the distributor cap and rotor, if any evidence of even slight corrosion
exists, this would give the exact symptoms you describe. Replace cap and rotor
and (I generally do the wires and clean the plugs as well). If this is all well and still
the problem exists then check the timing on the engine as the timing gear may have
slipped. Cylinder 1 should be at the top of the stroke when you manually rotate
the engine until the timing marks on the crank and timing chain cover align.
You can check this with a pencil or a stick to see where the highest point is after
rotating the crank if you do not have a timing light. Cylinder one is the closest
to the front of the vehicle. Use a socket and extension bar to manually rotate the
engine (in the direction it normally operates only). If ok then I would
have the ignition module tested at the parts jobber. Hope this helps.
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