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At idle, RPM jumps 1000 - 2000 - 1000 - 2000 and so on.

Block the IAC valve hose, and the RPM should decrease to below idle. If the RPM does not drop, inspect for air leaks and check the throttle stop adjustments.

If the RPM does drop, you need to adjust, clean, or replace the idle switch on the throttle valve.

Replacement MAP sensor

If the MAP sensor on a naturally aspirated engine has failed, you can purchase the 120kpa sensor from our website or use the following part numbers as substitutes:

  • Bosch 0261230217
  • Bosch 0261230299

In the event of a turbo-MAP failure, there are no direct substitutes available. You can purchase the 400kpa sensor from our website.