What these codes means ? plz help

[friends11 0]

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

[antil33t 90]

Vaccume leak maybe - can hear a loud hiss.

But seriously might be best to just take it to a professional.

[hybrid 1039]

Pulling the MAF on and off like that is putting the car in and out of different maps in the DME. It wont help the situation and will just confuse the DME. Intake temprature and airflow are sensed by the MAF the DME uses this to accurately calculate the amount of air and how much fuel your car needs at any given time. Removing it puts the DME back to pre-determined maps which will run rich. A safe mode if you will.

I would suggest clearing your adaptions first.

Also what gas to you put in the car?

Adaption out of range can be caused by a lot of things. As antil33t said, a vaccum leak, dirty or damaged MAF, worn plugs, leads, injectors, cam angle sensors, even a gammy crank singnal sensor.

You can test the MAF and you should be getting around 700KG/hour at WOT flow rate on an onramp.

[Greg111 13]

Had these codes esociated only with vacum leaks, your M54 has a normal air hose going to the throttle body with another little hose attached, that goes to the idle valve, this little hose may have a a hole in it as we replace alot of these hoses for that reason.

If you can reach down to it you may be able to stick your finger in it?

[allan 295]

If I may add while you are in that area check the one that goes to the fuel filter, both ends these just fall apart after a while.