i have a 04 audi a4 1.8t and it will barely start and when it does it barely has enough power to move,then turn off and wont turn back on.just sound like its not catching when i turn the key.

Check your spark plugs check your wires also check for any restrictions with your air flow and your exhaust may just need a simple tune up those cards need high voltage wires or could be a tiny little evap leak or something as a vacuum leak in your engine check the engine look for any open hoses