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Where Is The Knock Sensor On An Rb25Det?

SargeRX8

By SargeRX8,
in General Maintenance

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SargeRX8 Grand Master

SargeRX8

Posted
Posted

Hey all,

This is the quote from some other thread but thought I'll start a more specific thread.

I'm noticing something in my car I wasn't before. I had a PFC with base tune and that thing used to register about 40 - 50 knock sometimes up to 100 knock. I got one now tuned for a stock R33 GTST with 10psi. I see about 4 on average on the knock sensor, very rarely shoots up to 10 - 30.

Now, originally I had the standard dump on the car and it was leaking coz of a crack and you could hear the look coming onto boost. I changed it out for a screamer split dump while my other one got fixed. Now I fit the other one back on and I get a weird sound which only seems to happen from 5krpm. It picked up my attention straight away. Ive never heard the sound before but it only happened when I got the old dump put back on after it was fixed. People say pinging sounds like the word, like a ping on metal. This sound I hear is more like a "chick" kind of sound, like a match getting striked on a match box. Ive had this car for about 3 months now and this is the first time Ive noticed it. It only happened since I put my dump back on.

Knock sensor on my PFC still wont show anything above 15.

As above, what do you guys think? Could it be an exhaust leak somewhere rather than anything else?

Also back to the topic of the thread, where are the damn knock sensors on the motor? Anyone able to label them on a diagram?

Cheers.

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

bring it to me on the central coast i can road tune with a kmon knock box or we can dyno tune it on a weekday afternoon.

like i said in the other thread, try trimming the ign timing down 5 degrees to see if the noise is still there,

you shouldnt be boosting it around on an ecu not tuned for your car even if its tuned for a similar car with similar mods, theyre al different

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