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does it start without the choke? if it does you are probably flooding the engine with the choke readjust it
stopped up fuel filter or poor fuel delivery
most likely cause is the timing is advanced too much and isnt shutting off properly
because you don't know what you are doing
Blowing black smoke is indicative of an oil leak in the engine.
If this is a Power Stroke engine, the most likely cause is a faulty crankshaft position sensor.
You can find a detailed guide on fixing the motor on forums.hotrod.com/popular-hot-rodding/70/9384835/street/350-chevy-motor-not-running-please-help/
1995 blazer350 v-8 wont start unless i use starting fluid,once on it idles high
it will be the tors switches in the top of the carbs get a spark when checking but wont start
about 350 miles
because a 350 is a larger motor than the v6
It's in "reverse."