Got them measured (better late than never)
They seem to be the "wrong way around" IE Tighter on inlet and slacker on exhaust which I believe is actually the opposite to the norm on an RB? They're not perfect but am I right in saying they're not horrendous? I can't find the specs to suit the exact camtech cams anymore so using OEM and Other aftermarket specs they don't seem bad?
Put a video on to show. Using a stethoscope the noise doesn't seem to be focused around one area.
Worth noting the car has probably done 6000miles like this and it's never ever changed nor struggled to make power etc.
I'm a bit stumped!
The sensor grounds all go back to the ecu and none of them are on the battery ground, Adam suggest putting the flex sensor straight to earth because of it being a frequency signal can play with the others
it does it on the road now that I’ve driven it and paid attention, not sure if it’s rpm or load making it happen though
Sounds like a potential ground loop on the sensors.
The 2500 has the sensor grounds go back to the ECU yeah? Are there any grounds that have been looped together, OR grounds in the sensor wiring to the chassis / motor?
The alternator one is a bit weird, does the same thing happen on the road? Is it definitely dropping voltage based on boost, or is it just RPM dependent?
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