Hi, my volvo (99 reg) gdi seems to run well until it reaches about 3000 rpm it then hits a flat spot where you feel a loss of power to the point that if you try to accelerate it will even lose revs? but this only happens 2 out of 3 times sometime you go out and it runs beautifully! i've had a new ECU and checked for carbon build up. i've also had the throttle valve checked and a new cat put on but it still happens? seems to run well if floored? problem happens more when cruising?
can anyone help??
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