They are new, never ran. I have installed many sets of these with very little idle problems,, most problems come from installing them wrong or gov. assemblies that have been messed with before.
what do you mean have been messed with before im interested in the springs but this is my daily driver i had 4k now i bought a pump that supposably has 4k's that are shimmed but i can only hit 3200 with the new pump. so i need to do something how would i go about putting these springs in properly compared to other springs? ive always just counted clicks pm me thanks