TheRedRotor

Just noticed today after having my 8 for about a month that when you push the throttle all the way down it has a very throaty roar that is not heard when gradually accelerating to about 8500rpm. IfIi floor it around 4000rpm the noise does not occur until about 6300rpm. is this normal? I also noticed i do not have a VFAD could that be causing the issue?

wcs

iTrader: (2)

No way to know for sure from your post but it's likely perfectly fine.
There is a bunch of different stuff that happens as you go thru the RPM range

Just make sure there is no vacuum link from the removal of the VFLAD

TheRedRotor

The vacuum is sealed but my obd 2 scan said i was running rich could these be related? Just trying to make sure I dont do more harm if any

wcs

iTrader: (2)

OH you had the check engine light on?

Provide the exact code if you can.
What year is your RX8?
Mileage?
Any other modifications?

The Front O2 sensor on the RX8 has been known to fail.

TheRedRotor

2006 with 114,276km and lowering springs and exhaust but i dont exactly know which components (the guy i bought it from wasnt very knowledgeable) and dtc is p2097

wcs

iTrader: (2)

Ok, good.
Oh and welcome to the club.

Have you noticed a flashing CEL while driving or under heavy load?
Flashing check engine light means a misfire.
Coils are a very very common issue with the RX8. If you don't know how old they are you should just change them.
Poorly functioning coils can lead to a lot of un-burnt fuel to the catalytic which will ruin it.
Which is another very common issue on these cars, clogged or broken catalytic.

All I can say is if you are sure you don't have a vac leak (which would likely cause a System to Lean condition) then I would start with inspecting the plugs and testing the coils with a HEI Coil tester.

Is the stock intake still on, just the vflad has been removed?

You can find DTC information here -> https://www.rx8club.com/series-i-tec...n-guide-26291/

RX8 Workshop manual in pdf ... with help you trouble shoot your DTC code
https://www.rx8club.com/new-member-f...ls-pdf-245486/

This is a great new owners thread. I highly recommend you read it.
https://www.rx8club.com/new-member-f...t-here-202454/

Great thread about modifying your RX8
https://www.rx8club.com/new-member-f...rx-8-a-233937/

TheRedRotor

Thank you! No flashing CEL its solid, i think it flashed once and i do still have stock intake

Colon Terminus

At WOT a rotary sucks in a LOT of air. The intake roar is quite loud. Maybe that's what you're hearing. Personally, I love that sound,.