dville_gt

iTrader: (5)

pulled my plugs after ~200 miles and a few passes to see what they looked like, this is ~14psi on an lq9 w/ls6 intake a turbo cam. the plugs are ngk br7ef's. the cleaner/whiter plug came from #1 and the darker from #7. why would this be, and what can i do about it?

dville_gt

iTrader: (5)

here are all 4 from the driver side (1, 3, 5, 7)

Nitroused383

iTrader: (10)

Clean plugs / pistons means you're burning coolant. They all look pretty clean compared to #7. Throw a new set of plugs in maybe 7 is just fouled from your inital tuning.