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Old 09-14-2010, 02:46 AM   #1
cubuff
Scooby Specialist
 
Member#: 38345
Join Date: Jun 2003
Location: Littleton, CO
Vehicle:
2004 WRB WRX

Default misfire @ 6500 and above on higher boost

My problem is I have a misfire that seems to be somewhat intermittent, it is load dependent it will miss in 4th at 28psi but not in 3rd with 30+ psi. I have tried changing coil packs, adjusting dwell, timing, fuel etc... Its not in the tune its mechanical or electrical. I have filed down the crank sensor to close the airgap and I have changed plug gaps from big to small with no changes

I have a built ej207
Built version 8 heads w/1mm manley valves, supertech valvetrain, cosworth 278/274 cams
Twinscroll borg warner 91/79
FIC 2150cc injectors
In tank walbro to swirl pot with Fuelab external pump
-8 feed with -6 return
aeromotive fpr
AEM EMS


Compression is good and im waiting to do a leakdown to rule out any headgasket issue. I have a HKS amplifier on the way to try out and new race plugs to try. I am willing to try anything at this point I want to get this car back on the dyno asap without any misfire issues. Im itching to make good power with this car. Any info or help is welcome.

Thanks.
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