Every time l turn it off it wo not start right away l have to wait a little while.Whats wrong with it?
it starts right awaybut if l turn it off and try to restart it ,it just clicks and wo not start.so then l have to wait awhile before it will start again.its a 1990.

It will be break.

Bad starter!

Not enough info. Need year/make/engine, how long it is been running (how warm) before this occurs, warning lights on/off, etc.

'nuff said?

You really need to put more info about your problem. How does it run when you start it right away?
How long does it take to start?
Does it stall?
Is this fully warmed up or partially?
More info please.

the nut behind the wheel? lol jk not enough info is it overheating do you have to crank it for a long time before it starts?

Vacuum lock. You have a hole somewhere in a vacuum line.

l would suggest a bad starter, there is a thing called heat soak, thats when a starter gets hot after shutting down. But thats a no crank situation, does it crank and not start or not crank at all. If it doesnt start but cranks l would look at the ignition module for starters

Bite the bullet and take it in to the car shop and get it checked...
It is not worth you messing with it. If it clicks like you said it very well could be your battery going bad.

Good Luck

Change the starter or solenoid the part that is clicking is the solenoid some cars have the solenoid attached to the starter and some are located on the inside fender. Best thing to do is describe what year,make,model,engine size your car is.