At idle, RPM jumps 1000 - 2000 - 1000 - 2000 and so on.
If you block the IAC valve hose, RPM should fall below 550. If RPM hasn’t dropped, look for air leaks. Check throttle stop adjustments
If RPM have dropped, it is necessary to adjust, clean, or replace the Idle switch on the throttle valve.
Replacement MAP sensor
If MAP on an N/A engine has failed, use these P/N:
- Bosch 0261230217
- Bosch 0261230299
If turbo-MAP has failed, there are no direct substitutes. We use a 400 kPa sensor.