possible detonation?(video)

[Beatnik5]

Just pulled the motor and did all the timing chains and tensioners and on first crank I get this


Video: http://youtu.be/J_cbqJT51js

Almost cried thinking it was the chains again lol but the sound doesn't have a consistent rhythm like chains and starts misfiring after driving it a bit and letting it idle

I pulled codes and got:

p0171 fuel injection system too lean bank 1
P0174 fuel injection system too lean bank 2
P1131 lack of upstream heated oxygen sensor switch sensor indicates lean bank 1
P1151 lack of upstream heated oxygen sensor switch sensor indicates lean bank 2

So I'm hoping it's just a lean condition causing pinging, if this is the case and someone can confirm by listening to the video where should I start looking?

Thanks in advance for any help

 

[Number4]

Some have posted that it's easy to pinch/sever a wire on one of the O2 sensors putting it all back together. Though I don't know that it'd lead to that noise.