my A4 makes a rough 5 second noise just after ignition especially in the morning and after parking for over 1 hour what is it please help

 

Really need a more information to provide help. I am guessing here, but if you are saying the car runs rough for about 5 seconds then I would ask if when you start the car do you insert the key and turn the ignition quicky to get it cranking? The reason I ask is when you turn the key it starts the fuel pump and if you quickly turn the key the fuel system may not be fully pressurized when you start the car. Try turing the car on and then wait a few seconds before trying to start it. See if that helps.

 

hi thanks for the response. tried that but no good. when i turn the ignition 1st second okay from 2 to 5 is the noise then it disappears my mechanic thinks is the chain tensioner that is worn out. any suggestions.
Thanks

 

Have you confirmed the noise is coming from under the hood of the car? When you turn the key you should here noise for a few seconds as the fuel pump primes the system. that noise would come from just to the drivers left side. If it was the tensioner I wouldn't think it would go away after a few seconds. Best bet is to take it to a good mechanic that works on Audis.

 

am un able to upload a short video of the engine and the sound can i send you by email?