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Power Fc Knock Sensor

muzziak

By muzziak,
in Engines & Forced Induction

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muzziak Collaborator

muzziak

Posted
Posted

So my knock sensor was going crazy the past week or two, hitting values as high as 140-150 but sometimes staying low, never anything really consistent. I took it back to the tuner and on the way the AC pump started to make heaaappss of noise. We bumped down the timing a bit to reduce knock, but the tuner was saying the AC pump being on its way could also contribute to the large knock. Any validity with this statement ?

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https://www.sau.com.au/forums/topic/459713-power-fc-knock-sensor/
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GTSBoy Grand Master

GTSBoy

Posted
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Yup. It's not the "Power FC knock sensor"....it's the OEM knock sensor, and they are famously able to pick up other engine noise. Anything that involves bits of metal hitting other bits of metal can end up sounding like pinging to the knock sensor. The OEM ECU does a better job of filtering the audio from the knock sensor. The Power FC software is a bit more shit.

89CAL Grand Master

89CAL

Posted
Posted

A/C belt only drives the A/C so will cause no harm at all.

The fan belt drives the altenator as well as the water pump so it shouldnt really be removed for testing as you will have no water flow through the engine

Power steering and A/C Belts only drive the one thing so can be removed for testing

muzziak Collaborator

muzziak

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I didn't know, that's why I was asking Ben. We didn't put it on the dyno, just plugged the laptop in. He said it was down a bit, not enough to feel any difference though so I imagine a few kW ? Awesome, I'll take off the belt then and drive like that on the track day

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