[s-cars] S6 pinging woes - the continuation

[Bares, Vittorio]

Hi all - so here's what I've done since the last call for help:

 

Changed Stage 3 chips out of ECU

Backed out wastegate spring to stock

Replaced O2 sensor

Replaced FPR

Replaced TPS

Replaced RS2 injectors w/stock injectors (used)

Replaced sparkplugs (NGK BKR7E gapped @ 0.025)

Was informed that the fuel pump is already relayed

 

Sparkplugs are consistent in color - they look like the car is running
rich.

I peered down into the cylinders via the sparkplug holes - all cylinders
had the same color (grayish green) and I saw no signs of damage.

 

Car pings just revving in the driveway - if I get on it, as soon as I
can hear the turbo spool, all pinging goes away - but on the way there,
there's lots of loud pinging :o!

 

The car idles slightly rough - and I *think* I can hear some noise
coming from the bottom end - very light, sounds like, I dunno, sounds
like something is just slightly loose.

 

I've thought about the coils - but I don't think this would be the
result of a bad coil would it?

 

Anything else I should check?

 

Vittorio -