Blazer wont start...please help

please help..engine cranks but wont fire..

replaced-
plugs
wires
rotor
dis. cap
(engine is getting fuel)


I think its a minor problem..I got it to start up once and heard a whinding(rubbing) sound from the distributor
(All plugs and hoses hoses are clean, and secure)
Can someone please help????????

I have directed your other post to this one. 

battery connection question

One thing I have left to try is the thick gauge ground wire off the battery, that connects into the bottom of the engine is pulled out a little bit ( but feels firm)
If this is the problem of why the Blazer wont start, then a jump-start should fire it right up, right?
Cuz it doesnt

Have you checked for spark?  What is your fuel pressure?  Also what make, model, year?

93 s-10 blazer
yes I checked for spark in the #1 plug and got it..
Not exactly what the pressure is, but fuel squirts out pretty fierce when I push the pin..
The ground wire going from the battery to the engine looks pulled out a bit. (still need to fix)
Could this be the reason it will crank but not fire or it would not crank at all?

Also when I did get it to start while changing th plugsit made a steady whinding/rubbing sound(almost like an electric alarm clock), coming from the distributor...then it died..if this might help diagnosing