Audi a4 tfsi problems

[merculation]

I recently bought a 2007 audi a4 se s line Quattro from an online salvage site, the car had very light damage, looked as though it had drove into a tow bar of some sort

Anyways to cut a long story short, I have got the car sorted, serviced. Plugs etc, but the battery went flat on the car, so I bump started it down a hill, now the car is running lumpy and cuts out, at the back side of the cat is glowing bright red.

Do you think it is possible it may have jumped the ignition timing?? The car hasn't been run anywhere, so I thought it may have been bad petrol, or a cam sensor??

Any suggestions or does it look like I am going to have to strip it back down to check the timing