[2001hawk]

Originally Posted by schardbody

knock sensor code wont cause timing to be pulled, atleast on my truck it doesnt. i've verified with HPtuners that it runs exactly what my map says with the code on or off.

the felpro gaskets are fine, and i actually prefer them over OEM in truck applications (totally different gaskets than car).

DO NOT take the intake off without replacing both sensors and harness with OEM parts, or you'll be doing it again.

remove the foam from the bottom of the intake. use RTV (i prefer grey) to build a dam around the knock sensor connectors after install (you'll see what i mean when you get the intake off). the rear sensor will be rusted and have water/mud sitting in the valley. the foam prevents moisture from getting out so its got to go, the dam/sealant is to keep the moisture out.

take a GOOD look at your steam vent line/s i've seen quite a few rusted through or about to rust through.

leave the fuel rails on, no need to remove them. you will have to feed the evap purge solenoid nylon hose/line through the drivers side but its easily done.

i use a wet/dry vac to clean the heads intake mounting surface as soon as the intake comes off, you'll see why.

Why your vehicle would not pull timing when the knock sensors detect detonation is NOT normal. Every GM vehicle I have seen lays down like a dog when the knock sensors tell the PCM. Usually 12 degrees of timing is pulled and that is noticeable. Some of the guys rely on the knock sensors to pull timing for there nitrous. It is a little strange because if the knock sensors had been tuned out at some point it shouldn't be able to set off your MIL.