Throttle position sensor bad, throttle butterfly stuck, severe vacuum leak.
Check those three things.
You shouldn't have to, check for vacuum intake leaks
The idle is automatic. If the speed is not corect then you have to fix the problem with the idle motor.
750
No, that has nothing to do with idle speed.
Idle is computer controlled and is not adjustable. If idle speed is incorrect, you have a sensor or actuator issue.Idle is computer controlled and is not adjustable. If idle speed is incorrect, you have a sensor or actuator issue.
the engine runs at a faster rate than when the idle speed is lower.
This is controlled by the PCM, there is no adjustment other than cleaning the throttle body and the idle air port inside it.
Idle is computer controlled and can NOT be adjusted.
To adjust the idle speed on a 1997 Toyota Tercel, first ensure the engine is at normal operating temperature. Locate the idle adjustment screw on the throttle body, which is usually near the throttle linkage. Turning the screw clockwise will increase the idle speed, while counterclockwise will decrease it. After making adjustments, check the idle speed with a tachometer to ensure it falls within the manufacturer’s recommended range.
change the TPS Throttle Position Sensor
Idle speed is computer controlled and is not adjustable. If the speed is above 1500 or below 500 there is a sensor or actuator malfunction.
May be idle position sensor.