Cant get it to start

Remove number, one spark plug , turn engine over till compression is felt, turn engine over till TDC marks on crank pulley and timing cover marks line up, fit distributor to motor with rotor pointing to number one distributor cap tower, start and set final timing with timing light.

Did you set the timing or replace something ?

get a code reader the timing is fixed you cant move it try cranksesore ground wire not the battery one the on the block firewall fender fulepump fuse..

It could be the BCM, Body Control Module. You cant fix it, if indeed the is module bad, it must be replaced.

fix probally wont show on computer ......replace temp senor should fix

You cant reset it. So it cranks but wont start? V8? 6Cyl? You cant just guess and throw parts on it hoping you fix it. Have it towed to a shop and diagnosed.

could also be auto shutdown relay...

Yes, security system, try drivers & passengers doors & unlock with key.

id say your coil is getting weak, if you havent already tried it, it has trouble producing the excessive amounts of spark required to start the vehicle.

sound like timing problems. check timing belt or needs changing.