5.3/243 heads milled - Knock Sensor P0332

[JNJchev77]

I posed this in LS1tech, but figured why not try here as well... You guys always seem to come through with the answers.

I recently swapped 243 heads that were milled .030 and cometic gaskets .040, and an ls6 manifold onto my 5.3.

I'm having a knock sensor code P0332 come up now. I've already replaced the knock sensors and harness and it did clear the code for a week or so. But I've only driven the truck on some test runs, maybe a total 10 miles, no tune, and it popped up again last night.

Could this be timing curve/fuel delivery issue and it just needs to be tuned? Could an upper exhaust leak near the collector cause knock sensor code?

Prior to the heads/intake swap the truck was tuned and ran perfect for about 2200 miles, so I had to go and mess with it.

I should also mention that I swapped in an LS6 cam when engine was first rebuilt, before heads and intake swap and I replaced the knock sensors with aftermarket ones...


Justin