I have a 2003 Audi a4 Quattro 1.8t. I had the timing change redone, and redid the turbo, but the car now makes some odd noise when it started up. It runs, when we jump it, but the oil light comes on. Does anybody have any idea what the problem is?

 

what color oil light? if it's red- it's oil pressure. if it's yellow-it's oil level.