i have a 93 s10 blazer 4.3 vortec im pretty sure i have the timing right it gets good spark is getting gas but wont start it wont even backfire so if anyone can give me any help i would appreciate it

 

I moved your question to the blazer section of this forum to get more responses. You can also post your wuestion in the s10 section as well if you dont get an answer. Good Luck

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You have the timing right, you have a spark, and you have fuel. Next thing to check is compression. If you find that you have compression, you will want to double check your timing. Otherwise, make sure you intake is free and clear and make sure you are keeping the exhaust backpressure.