Why does my Mazda6 idle all the time?

If there isn’t any suction to it then it’s not likely to be causing a vacuum leak. Not every hose has a connection. This can be confusing to some. Idle issues are often caused by mixture issues, usually too much air. This could be the result of a vacuum leak as you suggest but it could also be the result of a faulty IAC valve.

Why is my Mazda 6 stalling at junctions?

Thanks for the reply – I’ve also stumbled across those threads when I’ve been looking into this problem. As far as I can tell, suction control valves (scv) seem to only be present on cars with diesel engines though, so might not relevant to my problem as mine’s a petrol.

Why does my computer idle all the time?

Idle issues are often caused by mixture issues, usually too much air. This could be the result of a vacuum leak as you suggest but it could also be the result of a faulty IAC valve. OR it could be that the computer is getting bad information and cannot correct for it with the IAC.

Why are the spark plugs on my Mazda 6 not working?

Spark Plugs – One of the absolute most common causes (if not the most common reason that your 6 may be misfiring) is the spark plugs. Although most modern vehicles use iridium spark plugs, they still need to be changed at the manufacturers recommended interval.

Why is my Mazda 6 running rough at idle?

Really, your 6 will be running rougher at any RPM, but a misfire will be most pronounced at idle. Spark Plug Wires – While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your 6 happens to have them, they can go bad and cause a rough idle.

How to fix a Mazda that stalls at stop?

Remove the air hose from the throttle body. Disconnect the throttle body connector. Remove the throttle body from the intake manifold, with the water hose connected. Clean the throttle body on the air hose side using a soft, clean shop cloth, sprayed with engine cleaner (Mazda recommends their P/N 000-77-A86).

What are the O2 sensors on a Mazda 6?

The oxygen sensors that are equipped in your Mazda 6 are responsible for monitoring the exhaust to help the ECU determine the correct air/fuel mixture. Of all the sensors equipped in your vehicle, the O2 sensors may have it the hardest. They deal with super hot exhaust that can cover them in deposits that can leave them ineffective.

Where does the VAC plug go in a Mazda6?

The long end of it goes into the airbox. and judging on what the other guys on there are saying… the short end goes “somewhere” into the intake manifold. when I was looking for vac leaks the other day i noticed mine is also detached…. nobody over there has any clue as to where it plugs in. any one here have an idea? It may just be a vent.

Why does my Mazda 3 want to stall?

I’ve got the EXACT same problem. Put it in Neutral or Park, idles at 700 RPM. Put it in Drive and brake, idles at 300 and it feels like the car wants to stall. When the car is cold, it’s fine. When it warms up, it acts up.

Is there another post about the rough idle?

Before you get mad and think “another freaking post about the rough idle??!! Don’t you search the forums first??!!” let me explain… First, i have read probably every forum on here dating back 5+ years about the idle issue. And i’ve tried just about every suggestion i’ve come across, spare the major PITA ones.

What happens when your car has a rough idle?

When your car is experiencing a rough idle, your engine may chug, vibrate, or shake while it’s running. This will cause your overall driving experience to feel rough and you’ll likely be bouncing a little bit in your seat from it.

What causes the engine rpm to go up when idle?

When the engine idles, there will usually be a misfire that you can feel just from holding onto the steering wheel. Furthermore, the RPM of your engine will be higher than normal when the vehicle is idling. The RPM will usually go back to normal as you accelerate the vehicle, but will increase again after you stop.

Why does idle speed drop during cold startup?

If the idle air control valve did not compensate for these, the idle speed would drop when certain accessories are used. In severe cases, the engine may even stall. The idle air control valve is most important on a cold startup. Problems with the idle air control will be most obvious during this time.

When does idle surge start on Mazda 6?

When driving the car and coasting in neutral the rpm will drop to 900 and most of the time hold or sometime have a light flicker. Strong surges or drops only seem to happen if I am traveling slowly, less than 15 mph, or stopped. I’m not really sure about how well that statement holds up but will experiment more tomorrow.

What causes a car to have a rough idle?

The engine can run too rich or too lean. A too-rich mixture will result in poor fuel economy. A too-lean mixture will cause a rough idle. Solution: Since the oxygen sensor is part of the emissions system, its failure will usually trip a trouble code in the engine computer.

What should the RPM be on an idling car?

When you start your engine, and just let it run without pressing on the accelerator or putting it into gear, that’s idling. A properly idling engine should be able to maintain a steady but low rate of revolutions, somewhere in the vicinity of 1,000 RPM.

How can I tell if my car is idling?

What to do when your car is at high idle?

While observing the valve with a flashlight, turn the key to the “ON” position, (DO NOT START ENGINE.) the valve should move slightly. Step 3 – Engine vacuum is a sealed system and must hold a specific amount to maintain proper idle conditions, inspect the engine vacuum hoses and intake gaskets.

What happens if the idle speed is too high?

If it’s too high, fuel is wasted and more emissions are produced. During the relearning procedure, the PCM may change the idle speed until the correct speed is achieved. If the engine threatens to stall or idles too high, stepping on the gas slightly or taking the car for a short drive will help set the PCM correctly.

Does a car have to relearn idle when a battery is disconnected?

Does a Car Have to Relearn Idle When a Battery Is Disconnected? Many newer cars with powertrain control modules (PCMs) have to relearn engine idle after a battery is disconnected. The removal of electrical power from the engine erases idle memory from the PCM, the computer where it is stored. The relearning process depends on the PCM.

How is the idle speed of a car controlled?

Hello, the idle speed on your car is controlled by the computer through the throttle body motor assembly. Depending on what the desired idle speed is the computer will move the throttle plate until the engine reaches the desired RPM.

Why does the idle go up after cleaning the throttle body?

The idle is going to be high at first until the computer relearns the idle again. Cleaning the throttle body allowed more air to enter the engine, and the computer is compensating by adding more fuel.

Why does my Mazda 6 engine belt Rattle?

As for the belt, it could have been changed earlier in its life; same goes with the pulleys, but i could be wrong. Anyway, the issue we had with this vehicle was, during cold startups in the morning, or Winter, a rattling noise was heard coming from the engine bay during take off at around 2,000 RPM.

What did I do to my Mazda 6 engine?

I replaced the belt/serpentine tensioner pulley, idler pulley, serpentine belt, and spark plugs on a 2003 Mazda 6 2.3l car. This engine had 115k miles. I don… I replaced the belt/serpentine tensioner pulley, idler pulley, serpentine belt, and spark plugs on a 2003 Mazda 6 2.3l car. This engine had 115k miles.

What kind of belt does a Mazda 6 use?

I replaced the belt/serpentine tensioner pulley, idler pulley, serpentine belt, and spark plugs on a 2003 Mazda 6 2.3l car. This engine had 115k miles. I don… AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new features

What does it mean when your engine rattles when idle?

If it rattles when idle, it can mean something completely different than engine rattle while accelerating. Depending on the cause, repair costs can shoot through the roof. Read more below to find out what the problem could be. FREE towing & pick-ups! No obligation. Hassle-free! Engine Rattling when Idle? Accelerating? Here’s What That Means

What’s the low idle rate on a Mazda 3?

After putting in re new battery it began starting up quicker/nicer. But now I am idlng very low. I used to idle at like 850-950rpm and now I idle 750 and below and I feel the car shake as the needle kind of dances between 500 & 750. And the other day it actually stalled.

Why is my Mazda 3 2.3 not starting?

I recently started noticing that my Mazda 3 2005 2.3 was not starting as enthusiastically as it used to. I ended up changing out the battery just cuz I haven’t changed it in almost 5 years.

What’s the issue with my Mazda 6 MPs?

Since shortly after the 120,000 service I have been experiencing an issue where the car idles rough and often takes a while for the engine to turn over when starting. The starting issue doesn’t happen when the engine is cold (like when I first start for the day).

Are there any problems with the Mazda 6?

According to Car Complaints, the worst problem with the Mazda 6 is engine failure with the 2004 model having the highest instance of engine failure. The average mileage for engine failure occurring is 98,000 miles. Some owners believe that the exhaust system is poorly designed or too restrictive.

Why does my Mazda 3 stall at stops?

Something similar happened to me with my 2004 Mazda 3. At the end, the problem was the fuel pump. After disconnecting the battery to jump start another car, my car’s PCM could never re-learn how to control the engine because the fuel pressure was way below specifications.

Why does my car idle high all the time?

It is completely normal for cars to idle highly until warmed up. Though on your particular vehicle high idling will likely be caused by a dirty idle air control valve, or carbon buildup on the throttle plate. The idle air control valve will be partially cleaned when cleaning the throttle body.

What’s the idle speed of a Mazda 6?

Idle speed is usually at 750 rpm. it would often almost stall and spike back up and bounce between rpm to try and stay turning. Changed spark plugs and spark plug wires, they had never been changed. This made the issue less prominent/severe but still constant.

Is there a way to reset the throttle body?

This method is almost foolproof as long as all ECU control parameters are within their normal ranges. Resetting The Throttle Body Calibration (this step is conditional) A Rough Idle or a SES can sometimes be caused by a change in the throttle body position sensor calibration.

What’s the smell of a Mazda6 idle surge?

It is usually puddled in a circle with a radius of… say two inches. it has a burnt smell and is a shade of almost amber when put against something white. After a few hours it also “dries” up leaving a mark on the ground where it was but not remaining there as a liquid.

What kind of sound does a Mazda 6 make?

I have a 09 Mazda 6 that I purchased used about 3 years ago. For the past couple of months or so it has been making a soft, metallic rattling whenever I accelerated at low speeds (usually when I accelerated even a little bit at about 20MPH). For the past two days the sound has gotten much louder.

Why does my belt rattle when in idle?

Another is the serpentine belt tensioner, pulleys and/or condition of the belt. If the belt is stretched to its limit or if one of those pulleys is binding the tensioner will rattle against its stop. So have a shop inspect all of your shields and your belt & belt system.

What causes an engine to idle up and down?

A malfunctioning MAF sensor can cause a wild up/down engine idle speed (say, 0-2,000 rpm). This might be caused by a loose harness connection or by a damaged or contaminated sensing wire. The MAF sensor measures the amount of air flowing through the throttle valve.

What happens when engine idle speed is above programmed range?

When the engine idle speed is either above or below the programmed range, the ECU prompts the ISC to either increase or decrease bypass airflow. Naturally, as the IAC prompts the throttle plate to open, engine speed increases. The IAC features a plunger mechanism that may be stuck/sticking.

What is the problem with the idle air control valve?

The problem may involve an annoying change (up/down) of engine speed while cruising at a steady pace, a low drop (or even cut-out) at idle or when approaching a stop, a wild high engine speed of several thousand rpm followed by a drop to near zero, etc. • Dirty/sticking IAC (idle air control valve) (P0505)

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