Why is my rpm revving when I start my car?
Common causes of high RPM excursion at start-up are typically: large vacuum leak, throttle plate stuck open, cruise control stepper motor stuck in one position; faulty throttle position sensor, and/or faulty idle air control motor or solenoid.
Why does my car rev high sometimes?
There are many possibilities when your engine is idling too fast. If the computerized engine control system is faulty, high idling can be one symptom. A vacuum leak in any of the hoses can be the culprit—inspect them all for leaks. A bad idle-speed control unit can cause the problem; it may need to be replaced.
What causes surging in a car?
If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator), restricted fuel injectors, a vacuum leak or really anything that throws off the fuel mixture going in to the engine, this can cause the surge.
When does a Toyota Corolla start cold?
However, I bought the car new May of 2007 (I am the original and only owner), and now have 30,000 miles on the odometer and have a question about how the vehicle starts. When starting cold, most of the time, it starts right up (starts cold idle at 2000 rpm, than slowly moves down as the engine temp goes up).
What does rough starting mean on a Toyota?
Upon starting the engine up (which keep in mind, is still warm from my drive to the supermarket) the engine cranks for a while and sometimes starts “rough,” meaning that the engine almost seems like it’s a chore to start up.
Why does my Toyota engine start when I shut it down?
Also, when the motor is warmed up (fully warmed up=driving around town for more than 10 miles, or 10 minutes until temp is at normal operating temperature) and then shut down, starting the engine back up seems to yield a long cranking process before the engine finally turns over. Example: I leave the house to drive to the supermarket.