Howdy.
Not sure if this goes here, but I will put it here anyway. I have an 04 Mazdaspeed with the FM complete intake kit. I got the kit a few years ago, so it did not have the o2 signal modifier, and it had that crappy brass looking manual boost controller. Lately the car has decided to stumble a bit under full boost/load around 4000rpm, and again 700 to 1000 rpm later, and only in 3rd through 6th gear. It is not completely falling on its face like it is hitting boost cut, and I was afraid the spring was wearing out in the old boost controller, so I checked it. It was pretty oily and gross, so I got the Turbosmart Boost Tee and installed it today. The problem has not gone away. I have the O2 signal modifier on order now, will have to wait a week. Hopefully that fixes it. Anyone have a similar problem, advice, solutions?
Thanks and be groovy!