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Old 04-27-2005, 03:12 PM   #1
Scooby Newbie
Member#: 40409
Join Date: Jul 2003
Default 02 WRX - Hesitation at 5000 RPM

I have a 02 WRX, when I hit 5K RPM sometimes, it sense a little hesitation just for a second and then it continues. This is not consistent but started to happen over the last two mts.

Any ideas on where I should look.

The car is stock with no modifications. I use 93 OCT fuel in it.


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tellravi is offline   Reply With Quote
Old 04-27-2005, 04:40 PM   #2
Scooby Specialist
Member#: 36528
Join Date: May 2003
Location: florida
2002 Impreza Wrx


Is it while pushing the throttle really hard, or just at part throttle? If it's at part throttle, it sounds normal to me. As far as I know, the stock ecu changes the way it fuels at 5000rpm while at part throttle. This is what I'd bet is causing the hesitation.

hippy is offline   Reply With Quote
Old 04-27-2005, 08:21 PM   #3
Scooby Newbie
Member#: 40409
Join Date: Jul 2003

If that is the reason, why wont it happen everytime it hits 5K RPM

tellravi is offline   Reply With Quote
Old 04-27-2005, 08:35 PM   #4
Equilibrium Tuning
Member#: 26933
Join Date: Oct 2002
Chapter/Region: BAIC
Location: Fairfield, CA
2006 STI


actually, the ecu changes fueling around 4500RPM, no 5k. I'd recommend getting someone to log your ECU to get some more info about the problem.

-- Ed
Equilibrium Tuning is offline   Reply With Quote
Old 04-27-2005, 10:34 PM   #5
Scooby Newbie
Member#: 14180
Join Date: Jan 2002
Location: Oakland
2002 Stg.1 WRX Wagon
Platinum Metalic Silver


I had a similar problem, but after installing the Cobb AccessPort (stage 1 91 oct) the problem was gone. Now the power is consistent and smooth all the way through the power band.

j-wrx is offline   Reply With Quote

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