I am new here but I have a 94 z28 that I just replaced the lifters and pushrods and been having a hell of a time adjusting the valve lash tried while running and the online sequence neither one working I put back in old pushrods and runs a little better but they come loose

I had them set right at one time drive around for 30 min and 2 came loose but when running it runs very good any help would be great thanks and has plenty of oil pressure.....

 

Need more info on your replacement parts. Nothing should be coming loose.

If you use this info, you should not have any adjustment issues.