The throttle position sensor tells the ECU how much you've got the throttle open or how much you're stepping on the gas pedal.  Total failure of the TPS will cause the ECU to fall into a fail-safe mode - the car will run very rich.  The car will actually run pretty well with a failed TPS.

Make sure the TPS is within spec and adjusted.  A bad TPS (too much resistance at full open) can cause high RPM (> 4kRPM) hesitations!
Click here to go to the TPS adjustment HOW-TO page!

Once we've confirmed that the TPS is good, an adjustment will take care of any possible problems the TPS can cause.

Possible effects:
  • Hesitations
  • Inconsistent idle
  • Exhaust backfire
  • Surging

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