What these codes means ? plz help

Hello gentlemen,
last night I had trouble with my car and I scanned it with with my computer.
This is what came up..

CB Fuel Trim bank 2 control limit
CA Fuel trim bank 1 control limit
E3 Fuel trim bank 1, permissible range exceeded
E4 Fuel trim bank 1, permissible range exceeded

Tried to erase but it came up again,

also RPM is being funny not regular.

plz help

Thanks

you most likely have a vacuum leak.

Originally Posted by bricas45

you most likely have a vacuum leak.

Thanks, but where should I look ? any ideas ?

I forget to tell that when I disconnect the MAF plug while the car is running and reconnect it back the car shutdown.

Originally Posted by friends11

Thanks, but where should I look ? any ideas ?

I had a vacuum leak and it took me more than a year to find it (elapsed time).

I only found it with a smoke test.

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