Knock Levels - Rb20

[paulr33]

agree if you take 8deg and its still displaying knock then it might be mechanicl drivetrain noise

the knock sensor is a microphone in the block afterall

if your tune is reset by accident or incorrectly the following will be dead obvious

unstable idle or instant stall each time

wonky idle and hunting all over the place

engine check light on as boost kit is enabled by default

so if your PFC has reset itself either by human error or becuase its "dumb" then you would see those issues

the PFC saves its tune in NVRAM so its unlikely it has lost it's tune

[MrStabby]

If you have pulled 8 degrees out it will be a lot slower... so does it feel sluggish after that change?

Also, look for stuff like loose starter motor. The rattling can set off the knock sensor.

[RBceffy25]

This may be a noob question but here go's.

Say a head is cracked and through the intake stroke is ingesting water/coolant then trying to compress and burn it.

Could any side effects of this be linked to knock? or just misfire?

Cheers!

[MrStabby]

This may be a noob question but here go's.

Say a head is cracked and through the intake stroke is ingesting water/coolant then trying to compress and burn it.

Could any side effects of this be linked to knock? or just misfire?

During the compression stroke it will loose the air/fuel mix out the same crack, so that wont cause knock. Only problem i see is that if too much coolant were drawn in and the engine hydro locked. Probably couldnt happen tho - when you look at piston speeds and how heavy (and thus resistant to motion) coolant is. I'm guessing...

[want_33]

so yeah after i pull 8 degrees out i check the ign moniter level and it noticibly drops and the car is more sluggish. The tune still seems to be fine. it has twin plate and a 2 way and a fair few lifters are noisy as shit.... so hoping its all good. new batch of fuel friday before i head off to sydney.