I don't know if this has been addressed before, did a search and found nothing good.
I have all the latest flashes and the recall 4206F done.
When on the gas in 3rd or 4th gear on a long accel the car stumbles/misses/surges twice at about 5-6 grand and at 7-8 grand then pulls clean to redline.
Is this just the aux ports opening and giving a small "hit" at high RPM's??
There are no other problems, no CEL's, just curious.

 

Please give us more info on your car, year&mod, miles, tranny, gas reg-prem...anything that might help us. There is a small change you can feel but not a Stumble.

 

Ports sticking?

How often do Redline?

 

x2.

beers

 

Ok sorry, 05, 6mt,12000 miles, prem gas, and 2-3 redlines every time I drive.
Took her out yesterday for church and noticed what was happening. It feels like the kick of an oldschool 4bbl carb snapping open.
I called it a stumble, it is hard to discribe, just a little funny blip in the powerband always at the same RPM points.
I didn't think the port switching was noticable.

And for those who don't know, I have owned 4 other rotaries, all RX7's and they never were babied. Whats the point of 9000 rpm on the tach if it is never used.

 

ports opening slow or are gummed up.. but that would be odd at 12k miles..

beers

 

My car feels like the turbo is kicking in when the aux ports open around 7000 - is that what you mean? It definately does not feel like a stumble . Perhaps take a drive in another 8 and see if it is the same .

 

I also have an 05, about 11.5k miles, 6mt, and I notice the same thing...
I only notice it around 4.5 to 5.5krpm dough...It is like a sudden hesitation in acceleration....
Then, on occation I notice it as I cross the 7krpm mark....