i replace the starter and the distributor. and check the fuel pressure and am getting 42psi it still wont start am geting spark.. i think it could be the computer that might be bad i try starting fluid it still dont start

 

is engine turning over normally? if its fast suspect timing chain. what did it do when first not start? did it shut off or just didnt start one day? what year is truck? if u have spark & compression it should fire on starting fluid. could be clogged fuel filter but should still start on starting fluid.

 

ok my engine blew in my 97 blazer so baught a used engine put new rod berrings head gaskets n intake gaskets has new timeing chain and gears, water pump raditor new cap and disributor. went to start it and wont start..gorunded the sprk plud and has spark, put fuel in the throtle tried stater fluid, it will roll over, also has a new starter...is it possible that the cap mite be bad iv herd even the new spider cap are bad even baught brand new any ideas?

 

Engine is most likely out of time. Why, if you have spark and it still does not hit then compression is most likely not hitting when it sparks. Oh, crank position sensor, well probally ok if it is sparking. I don't think it has a cam sensor, not sure. I'd start with the timing.