Internal ref: Silver 04 Audi A4
Error code P0301, car fails to provide enough boost on high revolution only when gas pedal is pushed all the way. There is a car excitation as if car was running out of fuel or as if the fuel filter is dirty ...
Checked the Coils and spark plugs for cylinder 1 and replaced them. The issue was reduced and now I get PS2 Truck Scanner when before that code did not show up on ODBII.
Exchanged coil cylinder 2 for 3 and then I got codes: P0300 and P0303.
Question: Will another coil and spark plug for 3rd cylinder fix the issue or is produced for something else besides coils and spark plugs?

 

Replace all the spark plugs first. If one or two is glazed or just going bad, it will cause a misfire on acceleration because it will produce a very weak spark. Weak enough so that when fuel is added to the mix quickly (under acceleration) it will basically drown out the spark causing the fuel not to ignite, therefore a misfire. It also seems to be that the coil you moved from cylinder 2 to 3 could be causing the misfire as the error code shows that it is following that particular coil. Regardless, change the rest of the spark plugs first to see if the problem goes away (cheapest route first). Also check for proper gap before installing them. I think the proper gap is 032". While you're changing them, move the coil to the number 4 cylinder. If you get a misfire and a P0304 (misfire on cylinder 4) code, you will know that particular coil is defective and replace it.