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What does it mean when car stutters during idle ?

Alveron2001

By Alveron2001,
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Alveron2001

Alveron2001

Neutral Newbie

Hi Guys.

 

Have recently noticed this in my ride during idling. Engine would hum smoothly, but every 1-2 minutes, can feel a skip/hiccup in the rythm. There's no lound or audible noise, but can feel the skip through the vibration of the car (hand of steering wheel). It goes something like this:

 

"brrrm, brrrm, brrm, brrrm, brrrm, .. .. brrrm, brrrm, brrm, brrrm"

 

- There's no stalling. Engine contiues humming without dying

- Engine idle rpm is constant (must check again to be sure)

- Using RON 95

 

I'm worried that this could be the beginning of something and hope to address it before it becomes a problem.

 

Based on my layman's guesses, could be the following ???

 

- Fuel need to be higher octane. (I'm using 95 as recommended)

- Need to service and replace engine oil.

- Fuel Filter clogged.

- Engine needs tuning.

 

My ride is due for servicing in another 500km. So thinking of getting this looked into at the same time. But must know what to tell them to avoid being "smoked" and getting a big fat bill for unnecessary part changes....

 

Any experts please feel free to offer advise.

 

 

Thanks In Advance

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Alveron2001

Alveron2001

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I think it might be this..... Air Flow sensor....

 

I am using a K&N drop in filter... Might be time to clean it... or maybe change back to the regular paper-sensor.

 

Have been warned before about using K&N drop in filter... that it will mess up the Air Flow Sensor....

 

Will do the switch-a-roo back and see how...

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Try_conti

Try_conti

2nd Gear

actually since you're switching it back, can run your fingers into the air intake to see if there's any oil trace. If don't have, high chance its not the K&N filter.

 

If have .... sweatdrop.gif maintenance liao .... sweatdrop.gif

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Alveron2001

Alveron2001

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>>>did you happened to change your air filter ? Dirty throttle body ???

 

>>>Changes so far:

>>>K&N High flow filter

 

I also changed to K&N filter.... Was warned on this before... Any problems with your K&N filter ? Is yours the type with is maintainance free ? Or the one which needs to clean and apply the K&N oil ?

 

 

How to clean throttle body ??? Can DIY ? or better to get a mech to do it ?

 

Tanks Bro...

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Alveron2001

Alveron2001

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Got a PM from our resident Octy expert here. KOOBALA !!!

 

Post up for everyone's benefit to see / learn...

 

---------------------------

 

Some inputs with regards to your irregular idling:

- dirty throttle body

- air filter element requiring replacement. Check for PCV filter (wire mesh) for possible debris which blocks the delivery of air into the air intake section.

 

The other components which you may want to check/replace:

- fuel filter (have you been topping up quite regularly in M'sia?)

- engine mount (for possible wear)

 

How much mileage has your ride covered to date? Stick to RON95. RON98 will not help in the problem. Using a petrol with lower RON than recommended will result in misfiring of the ignition, resulting in pinging/knocking.

 

Keep us updated on the outcome of the diagnosis.

 

For the engine oil, there will be no effect on the idling if it has been expired. One of the most cost-effective engine oil is the C a r L u b e Triple R 5W-40. Try to get hold of it for oil change.

 

Rgds,

TS

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Try_conti

Try_conti

2nd Gear

no problem so far. mine is not maintenance free. need to clean & apply oil type but so far still alright.

 

Apparently you can try DIY to clean throttle body. Do a search in Skodasg. There's a discussion a couple of months back. You can get that spray to do the cleaning (can't remember what it was called). But if no oil trace air intake, maybe its not dirty throttle body issue.

 

Think as Koolaba has mentioned, what's the mileage of your ride ? Clogged fuel injector ? Carbon build-up ? All these could lead to rough idling ...

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Alveron2001

Alveron2001

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My mileage is only 35K lar... shouldn't be too dirty... Doubt it's carbon build up or clogged fuel injector.

 

Are checks for carbon build up & clogged fuel injectors part of Regular Servicing checks ? As mentioned... I'm due for servicing in 500km...

 

Time to take out the K&M oil & cleaner to do some cleaning !!!

 

Thanks for the tip on throttle body cleaning. Definately good to learn !

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Try_conti

Try_conti

2nd Gear

Unfortunately carbon buildup & clogged injectors are not detected in regular servicing. You can get those injector cleaner or fuel system cleaner & pour in a bottle during your next petrol topup & go for a long high speed drive ala carbon clearing.

 

Spend a weekend in Malacca. Do a 120km/h there & back with a bottle of these cleaners added when you top up. That should clear it.

 

Of course since your servicing is due, you can also complain to the mech. & see what they do to solve the problem (assuming they solve it for you, that is !).

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Sky8807

Sky8807

1st Gear

Most probably the sparkplugs is the cause.

change and see.

Cheers

 

  Quote
Hi Guys.

 

Have recently noticed this in my ride during idling. Engine would hum smoothly, but every 1-2 minutes, can feel a skip/hiccup in the rythm. There's no lound or audible noise, but can feel the skip through the vibration of the car (hand of steering wheel). It goes something like this:

 

"brrrm, brrrm, brrm, brrrm, brrrm, .. .. brrrm, brrrm, brrm, brrrm"

 

- There's no stalling. Engine contiues humming without dying

- Engine idle rpm is constant (must check again to be sure)

- Using RON 95

 

I'm worried that this could be the beginning of something and hope to address it before it becomes a problem.

 

Based on my layman's guesses, could be the following ???

 

- Fuel need to be higher octane. (I'm using 95 as recommended)

- Need to service and replace engine oil.

- Fuel Filter clogged.

- Engine needs tuning.

 

My ride is due for servicing in another 500km. So thinking of getting this looked into at the same time. But must know what to tell them to avoid being "smoked" and getting a big fat bill for unnecessary part changes....

 

Any experts please feel free to offer advise.

 

 

Thanks In Advance

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Alveron2001

Alveron2001

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yes.

 

Also considered dying spark plugs... But these should be replaced in upcoming servicing.. so no worries here.

 

It's been about 10K since the last servicing. Not sure how long spark plugs should last ? 10-15K ? 25K ?

 

Think it should be the Air Filter as others suggested...

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