I'll try to explain. I just bought an 8 with 48K on it. 6 sp.. Car has been dealer serviced all it's life. (I know, I know). I haven't driven a rotary before but I have driven some hot cars. All the guages read where they should be. (I've done a little homework)....Now, when I have my foot in it and am excellerating past about 5-6K it starts to fluxuate a little in pull power between 5-6 and 8.5K. It's not a drastic fluxuation. Sort of feels like a lack of fuel feed in a normally aspirated car when the fuel pump can't catch up with the demand. I don't believe the coils have ever been changed. At least no record of it. Matter of fact nothing major has been done to the car or there's no record of it. Any ideas

Thanks for knowledgeable replies
While I'm thinking about it..if it is my cat would you buy this?

RX-8 High Flow Catalytic Converter - NEVER USED!

304 (.065 Super Thick) Stainless Steel RX-8 High Flow Catalytic Converter built for a horsepower increase on your RX-8. It also gives the RX-8 a deep healthy sound.

Made of 304 stainless steel mandrel bent high flow tubing with a high performance super flowing catalytic converter. 1

100% bolt-on with simple hand tools.

13+ Pounds lighter than stock!

6-Speed RX-8 - Part #RX8-8A-K2

Selling for $200.

Original price paid was $699.

Sold car so I have no use for this part.

 

check your plugs/coils.
You may have a stuck ssv, apv or vdi valves.
click the google link in my sig and type in those 3 valves to diagnose

Good luck

PS what brand is that high flow cat?

 

Sounds like the "normal" dips at the opening of the APV and VDI.

 

Didn't give a brand name soldier. I'll have to ask. I'll let ya know.

 

+1

OP- as these valves open the powerband will dip slightly. Take a look at some of the numerous dyno sheets posted here. You'll see that the APV and VDI causes these powerband dips.

 

I wound it up yesterday from 2nd,3rd,4th and let off in 5th while pulling onto the interstate and didn't notice any letup in excelleration. Maybe I just had to blow it out. I've redlined it a few times since I bougt it. I also added about 2 oz of injector cleaner to half a tank of fuel. The plugs were changed 8K ago. No coil change on record. I would bet no. I'll monitor it for a couple thousand miles and get more used to driving it. I must admit it sounds really great winding up. Totally different from any other engine sound. Sort of find yourself relaxing and taking a deep breath when you pull it in the driveway and shut her down. YESSSS!


P.S. Guess I shouldn't think about keeping up with gas mileage for a couple tanks huh?

 

Yes it is normal.