I own a 2000 Mazda RX7......and recently had a rear engine/transmission seal leak fixed.........almost $1000..........

Still leaks.

Here is a list of problems:

1. Leak (described above)
2. Hesitates....stumbles 90% of the time while trying to HARD accelerate. (So is is electrical.....vacuum......Turbo???)

Some times.........if the turn the car off..........then back on.........the car will accelerate and boost like a beast.......

But........if I turn it off........and back on.........it stops at 0 on the boost gauge.....and stumbles/hesitates badly......so I have to back off the acceleration and slowly accelerate.....but still stops caps off at 0.

I started changing hoses throughout engine.........but I really believe its electrical. Maybe a sensor.....or some pump resetting each time the vehicle is shut off and turned on.

Anybody have a similar problem?