Sounds like you just got it in wrong to begin with.You probably set it up on #1 exhaust stroke instead of compression stroke.
Remove the No. 1 cylinder spark plug. Turn the engine using a socket wrench on the large bolt on the front of the crankshaft pulley. Place a finger or compression gauge on the No. 1 spark plug hole and turn the crankshaft until the piston reaches Top Dead Center (TDC). As the engine approaches TDC, you will feel air being expelled by the No. 1 cylinder.You should be able to look down at the timing gauge on the crank pulley and see the timing mark pointing at zero when you have it right. If the position is not being met, turn the engine another full turn (360 degree). Once the engine's position is correct, install the spark plug and stab the distributor so that the rotor is pointing at #1 terminal on the cap.I usually put the cap on ahead of time and make a little mark on the dist. base where #1 is at,then remove the cap and stab it.Remember!The rotor will spin as you are stabbing the distributor,so you may have to spin the gear back a couple of teeth to get it to set right by the time it's set.If the dist. does not sink all the way down,it's just the oil pump drive that has to line up.Have a helper bump the motor while you hold downward pressure on the dist. and it will drop in. Now set the timing to spec and tighten it down.
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