Hello,

I'm new to this forum and I was wondering If anyone could help me please.

I've got an 02 Impreza GX with the only modification Is with A Powerflow Exhaust.

I've had this hesitation for about 3 years now and I think that enough Is enough. I've replace mostly everything including: TPS Sensor, Throttle Body, Knock Sensor, Plugs, Leads, Coil Pack. IACV.

I have done some data logging and I've noticed A few things.

The knocking correction Is at -3.
The MAP reading Is lower then expected around 25 - 26
And Manifold Relative Pressure Is reading -72 and -74

There are no leaks present In the Vacuum system.

If anyone has got any advise or has had any experience with this sort of hesitation?. I would be very much appreciative.

Many Thanks

 

Might be worth replacing the camshaft sensor and crank sensor. Replaced mine and cut down hesitation