To calibrate the voltage on the TPS Sensor, a sensor on the throttle  body that tells the ECU where the throttle is positioned. Over time the  Tps goes out of calibration and your car's performance suffers greatly  for it.  I was VERY impressed with the difference this made to my car. It  increased throttle response, smoothly revving across the whole rev range  and makes for a far enjoyable car to drive.  If your car is around the 8 year old mark, you should DEFINATELY do this  if you want better performance from your car and offcoarse, who  dosen't?!  Again, I can't emphasize how effective this is, a must do!   THE TPS IS OVERLOOKED OR SHOULD I SAY NOT UNDERSTOOD BUT THE TPS HOLDS GREAT BENEFITS WHEN CALIBRATED.   This can be performed by yourself, without help, no problem.    This is being done on a d16y4.    Steps:     Remove the Throttle body - 4 bolts  3 sensors that just unplug (TPS, Map and IACV)  2 coolant hoses on the bottom, unclip the metal clamp and pull the ho...
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