Knock level when cold-ish

[djb23_gtst]

Hi All,

I have an R33 GTS25t with Power FC. I have noticed in the last 2 weeks or so that my knock levels seem to spike when I drive my car away from a standstill when it is not at full operating temp. This happens when I leave my home or work when the car has cooled off (water temp down to ambient air).

The knock level will spike up around 15 to 20 just as I begin to accelerate from a standstill GENTLY ie: low load, low boost etc. The spiking will continue for maybe another 30-60 secs before it decays completely and then never occurs again. I realise this is a low knock level, but it has only just begun to do this.

Any ideas would be greatly appreciated. I'm thinking maybe the engine is a bit rattling before it is completely warmed up....as I let the water temp get to about 50 deg C before I drive it away from standstill. Other thoughts include a lazy injector, or a lazy pump....

Specs are: 3" cat back exhaust, large intercooler, 12 psi, Power FC, pod filter, w@nk BOV

danke

Dan

[Steve]

could be anything, the knock sensor is only a microphone, it could be even be something like your clutch.

[T0nyGTSt]

You knock sensor might be fubar.

The bottom line is take notice of your hot reading - that's most important.

T.

mine sits on 7-8-9!

[muffas 180]

I wouldnt be too worried. 20 is very low. Shouldnt be boosting until normal operating temps anyway.

Michael....