Both of my late model vehicles do this; the fuel injected vehicles have a variation of a idle speed motor/ idle speed control valve/ many different names. What they do is adjust the idle. Many times they can cause a slight lean condition which manifests itself as a slight rough idle. I would not worry about it and don't throw dollar bills at it.
This question is too vague to be answered. It should be restated with a more detailed description. Where is the vibration felt? Is the car in gear or in nuetral? Is the car moving or still? Be specific and give all the details. I also encounter the same problem with our dodge caravan. There is too much vibration when the Drive is engaged and the car is not moving. The vibration is normal when the van is in Park or Neutral.
Mine is between 500 and 600 rpm's after the engine is warmed up.
It is the idling sensor on top of the intake
Chances are, particularly if this is an automatic transmission, you are low on tranny fluid. To check this, the engine needs to be at normal operating temperature and idling. Checking tranny fluid when the engine is cold and not idling will give a false reading, indicating that it is full ...
It is normal for a little vibration with the air conditioning on due to the compressor working , fans on , and engine running a little warmer. On at least 92-96 Toyota's the fans automatically come on when the ac is turned on
No. It should be idling around 650 warmed up. Look for a possible vacuum leak.
Vibration at idle, especially with automatic transmission, is usually caused by engine idling to slow. Now, since there is no idle adjustment screw anymore you need to have the vehicle checked at your Toyota Dealer. Some vibration, even to that level is normal. IF IT HAPPENS IN THE PROCESS OF STOPPING, WHILE BRAKING, YOUR BRAKE ROTORS ARE LIKELY OUT OF ROUND.
Vacuum leak.
Air conditioner or defroster on - normal should be running Vehicle low on coolant? Trying to keep engine in normal range Defective coolant sensor?
it is vacuum vavle controled by engine temperature. mostly used until engine gets up to normal operating temperature, or after the engine gets to normal operating temperature. depending on what is hooked up to the vavle. i hope this helps Answer your question.
Yes, idling an engine puts more wear and tear on an engine (especially diesels) than normal driving does. It's also bad for the environment, not to mention just plain wasteful.
There is no filler cap for a transmission. to add fluid you must pour it down the dipstick tube. only check the level of the fluid with the engine idling at normal running temperature.