FFDP

iTrader: (2)

Having code P0332 present will automatically retard the timing to it's maximum amount under enough load. Generally that is 8 degrees of knock and pile on a faulty o2 sensor and random misfire it's seems likely that you'll be getting some issues.

Inspect and replace the knock sensors/harness, see if the codes go away. If not you can disabled the 2 knock sensor codes and it will stop pulling timing but the sensors will still work at normal. It's a somewhat common thing I see.

MikeGyver

iTrader: (5)

Can anyone give suggestions as to why it is knocking?

MikeGyver

iTrader: (5)

Both the fuel pump and fuel filter responses are the only ones addressing the knock issue.

1994Vmax

iTrader: (4)

My buddies 04 6 liter truck was doing this too... all fuels would knock, and nothing really helped. The truck was throwing knock sensor codes which he did but it didn't help the issue. I ended up logging the truck and his MAF was reading really low compared to what I expected to see. I swapped a MAF off of one of my other trucks and all the pinging went away along with his MAF versus rpm coming back up to normal. It never tossed a mass air code as the thing wasnt reading out of range... just not nearly high enough. Something else to eliminate along the way.

BudRacing

iTrader: (3)

On that note, unplugging the MAF to rule it out could help too. It'll still run but in open loop and probably a bit richer.

Last Call

iTrader: (4)

Log the bank 1 and bank 2 O2 voltages. If it is knocking from fuel (lean), it will show up there.