I need some help I have a 91 camaro z28 5.7L 350 and it will not crank up for about a hour after it has been driven. the fuel pump and ecm has been changed. Can anyone offer some advice.

 

if it cranks but wont start check for spark. first thing i would do is change the ignition pick up coil. they dont cost alot and are fairly easy if you put the distributor back how it was. plus they like to start messing up. if there is no start still try ignition module