Originally Posted by djgoldeneye
Im asking for your help. I recently bought a Audi A4 1999 Quattro and i having an issue with it. Whenever i accelerate the noise, ticking/clicking gets louder. if i am cruising steadily, lets say 60mph in 4th speed its not obvious but if you accelerate then the noise comes back.
Please id like your opinion on this.
Could be the hydraulic lifters have some dirt or sludge in them. Try a can of oil detergent in the oil for several hundred miles and see if it goes away. If yes then change the oil afterwards as the oil will be quite dirty. All oils have some detergent in them but if oil changes were not done regularly sludge can build up - especially in turbo cars where the oil will see more heat.
The other possible cause could be the injectors. Try a can of BG44K in the gas for this issue.
If neither one solves the issue try a local independent Audi shop - look on the local forums for recommendations.