ok so first my car sat for like 3 weeks because i burnt a hole in the return line for the turbo and didnt have the time to fix it
i fixed it with a new line and tryed to start the car and all i got was one single click
got the battery exchanged thinking that was it...nothing
replaced the starter...nothing
replaced the starter relay...nothing
then my dad decides to look at it and goes to try to start the car plays with the key for a bit (turning on and off) and it suddenly decides to start! and its been working for a month now
now the problem has started again all im getting is one single click when i turn the key but i can push start it (pain in the ass) and it runs fine
any suggestions on fixing this prob?
i do have a leaky fpr im not sure if that would keep it from working but in the process of getting a new one

So when you try to start the car you get one single click and then nothing?

It has nothing to do with your engine stuff in that case, it's only something in the starter circuit.

What brand/batter/starter did you replace it with?

Have you checked the connections for both battery cables [BOTH ends] and the connection for the starter solenoid [single black wire that runs to starter].

>
red top optima and i dont remember the brand of starter it came from advanced auto and connections are good and yes all i get is one single click

Well, assuming your starter circuit is working correctly [solenoid is holding the switch closed], and both ends of both battery cables are tight and non corroded, you have a bad starter.

Not the first time a starter from autocrap or advanced was bad out of the box.