VersaTune User Forum

So I just had a hi flow cat fitted and new exhaust which is 3”. Car is much quieter now but now I’ve noticed a weird rattle, pinging like noise at about 3500 rpm I don’t think it’s pinging as the knock sensor should alter timing and inherently stop the noise but it doesn’t go away and always around same rpm even hear it on decel. Wondering if anyone could shed some light on it. Tried a couple of tunes and it still there at same rpm. It’s bugging the hell out of me. My clutch is on its way out as throw out is noisey when idling in neutral and goes away with clutch depressed. Could it possibly be a broken spring in clutch plate??

Any updates on this?

My only thought is perhaps the engine mounts?

Now about the knock sensor, I do not have any confidence in the RX8 knock sensor.

I'm honestly asking, have you ever logged data where it did something?

I never have, but maybe it's just me??

Engine mounts are fine as I just had one off to fit headers, I’ve been told that the knock sensor on rx8 is hyper sensitive, either way it does the same thing on various tunes so not sure what it could be, maybe it has always done it but now I have quieter exhaust I can hear it. I will do some further investigating when I get back from work

So I sorted out my rattle issue! It was a secondary shutter rattle from what I can make out, I installed a new tune, pops and bangs but altered the ssv opening back to std also altered fan temp settings and upped idle but these are by n by.

Thanks for keeping us posted