Toyota Hiace 2012 Bus 1tr Quantum 120000 miles
I’ve been troubleshooting high idle RPM issues on my Toyota Hiace with a 2TR-FE engine. After warming up to about 75°C, the idle RPM jumps from 950 to around 1600 and doesn’t settle back down.
So far, I’ve replaced the water pump, temperature sensor, and recently added a thermostat. The IACV and throttle body have been cleaned multiple times, and I’ve also checked for potential vacuum leaks and coolant airlocks. However, even after these replacements and checks, the RPM still rises once the engine reaches normal operating temperature.
Looking for further insights on what might be causing this persistent high idle.
Dilz from other
2 years ago DI
