Engine

Mazda 3 2004 Engine Revving when car not moving

Mazda 3 2004 Engine Revving when car not moving
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  • Christopher Thornton
  1. What causes an engine to rev while idle?
  2. What would cause an engine to rev on its own?
  3. How do you reset the throttle body on a Mazda 3?
  4. Why does my Mazda 3 keep stalling?
  5. Is it bad to rev the engine in park?
  6. Why is my car idle so high in park?
  7. Why is my cars rpm going up and down?
  8. What does engine surging mean?
  9. How much does it cost to fix an idle air control valve?
  10. What are the signs of a bad throttle position sensor?
  11. What are the symptoms of a bad throttle body?

What causes an engine to rev while idle?

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.

What would cause an engine to rev on its own?

One reason that your car's engine could be idling up and down on its own is a dirty mass air flow sensor. The mass air flow sensor attached to your car's engine is designed to sense the amount of air coming into the air intake and through the throttle valve of your engine.

How do you reset the throttle body on a Mazda 3?

Reconnect the battery and turn the key on but do not start the engine. Immediately depress the throttle to the floor (wide open throttle) 3 times. This will set the TPS angle.

Why does my Mazda 3 keep stalling?

Common reasons for this to happen:

Low fuel pressure, dirty or defective fuel injectors, or broken fuel pump: The fuel pump is responsible for transferring fuel from the tank to the engine. ... Loose or corroded wires in wiring harness: An inconsistently firing ignition will result in an easily stalled engine.

Is it bad to rev the engine in park?

Although some engines can cause damage even before reaching the set 'rev limit' I.e. Camshaft lifters 'jumping' out of position and causing internal damage. It's best to just let the engine idle as normal, you'll save fuel and the environment. ... It is never a good idea to rev an engine with no load on it.

Why is my car idle so high in park?

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. A faulty alternator can fast idle issues; if so, replace it.

Why is my cars rpm going up and down?

Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate. ... When this happens, the job of the idle air control valve is to bring this deceleration down to a slow and smooth idle rather than suddenly cutting off the fuel supply causing the motor to die.

What does engine surging mean?

Engine surging is different from a difficult start or a no-start problem. “Surging” does not refer to a knocking engine or one that idles rough or stalls. Engine surging is when an engine starts easily and accelerates smoothly, however after a few minutes at a steady speed, it either surges in speed or misfires.

How much does it cost to fix an idle air control valve?

The replacement cost of an idle control valve is anywhere from $120 to $500. The cost of the parts alone will be between $70 and $400+, depending on the make and model of your vehicle. The labor cost should only be around $50 to $100 because it doesn't take that long to remove and replace the old idle control valve.

What are the signs of a bad throttle position sensor?

Symptoms of a Bad or Failing Throttle Position Sensor

What are the symptoms of a bad throttle body?

When a throttle body is not functioning correctly, some noticeable characteristics may be poor or very low idle. This can include stalling when coming to a stop or very low idle after starting, or even stalling if the throttle is quickly pressed (resulting in the throttle body plate opening and closing very quickly).

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