Just installed a Unifilter Rampod today, replacing a paper type pod, and now the car (MY99WRX) is noticably slower.

Do I need to reset the ECU, or have I done something wrong???

 

Its possible that it has messed up the maf output causing it to run leaner and hence the whole feel of the car will be "slower"

 

If I reset the ECU will this cure this prob???

 

No it needs to be remapped if this is the case. The APS HFA seems a major culprit here - see my other thread - others have similar findings. Note that 0.2-0.3V MAF deficit can mean around 15-20% less fuel! Quite astonishing how susceptible MAF sensors are to a change to their system for calibration.

 

Just went for a drive, the day after fitting unifilter rampod, and it seems that is getting quicker the more I drive it. Not quite back to normal, but nearly there???