I am new to this forum and I bought an 06 Acura TSX about 2 weeks ago. it was running fine and yesterday afternoon I shut the car off and ran into a store for maybe 3-4 minutes and I came back out and it wouldn’t start. I finally got it started by holding down the throttle, would not stay running unless I was on it and it was running very rough and it was abnormally loud like the exhaust broke or the vtech was stuck open. It would not stay running unless I held on the throttle and would not proceed into very high rpms. Maybe 3000 rpms at the most. Anyone have any idea what it could be?