blazer wont start cranks like a champ I replaced entire fuel system from spider 2 fuel filter to fuel pump and I replace the engine cool distributor cap pickup coil and engine control module ignition control module still I can't get it to start

 

but did you actually check fuel pressure, good spark. no major vacuum leaks, proper cranking speed, No security light, etc.?
Also, Model year, Mileage, Describe "cranks like a champ" because mine did that plenty well but there were some telling signs in the sound as to why it refused to start.

 

Did you have a compression issue

 

sucking massive amounts of air from around the plenum, actually, to the point that you could hear it whistling if you got close enough.

 

Just because it pulls air doesn't mean it is compressing it.

 

If there was no compression you would hear it. anyway's we're off topic.