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Old 16-09-2019   #1
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Talking Rough Idle / Misfire - When car is warm?

Hey guys I have a grande punto tjet 1.4 2009.

I have noticed that when my car is warm (upto temperature) there is a feeling of a shudder, grumble underneath me when the car is sitting stationary and idling.

Now it is not a fierce shudder that makes you feel if car is shaking apart, but it is definately there. It does it to a steady pace - so it fades in and out doing it at a constant tempo that you can guess when it is going to do it, its not random in and out all over timings, but as soon as you drive away it goes.

Added info: (not sure if linked but just providing)

1) When i start the car up from cold the rev counter / needle is high at about 1100 revs for about 30 secs and then levels out to about 800 revs. I have the most MINOR HAIRLINE of cracks in one of the air hoses attached on the engine cover - So not sure if that is causing high initial revs

2) When you can feel the shudder, everything else is normal, the rev needle isn't fluctuating or anything you can just feel. If it wasn't doing this shudder / grumble you woundlt think anything is wrong with the car.


thanks in advance
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Old 16-09-2019   #2
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Re: Rough Idle / Misfire - When car is warm?

Any (small) leak at the lambda sensors or at exhaust flex pipe ?
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Old 16-09-2019   #3
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Red face Re: Rough Idle / Misfire - When car is warm?

Quote Originally Posted by Bernievarian View Post
Any (small) leak at the lambda sensors or at exhaust flex pipe ?
Not too sure,as i have never checked to see if they are blowing but 02 sensor or on the exhaust. So if it was this would cause the juddering feeling when car is upto temp?
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Old 4 Weeks Ago   #4
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Re: Rough Idle / Misfire - When car is warm?

"1) When i start the car up from cold the rev counter / needle is high at about 1100 revs for about 30 secs and then levels out to about 800 revs. I have the most MINOR HAIRLINE of cracks in one of the air hoses attached on the engine cover - So not sure if that is causing high initial revs"

Higher RPM when cold is normal.

Could your judder be worn engine mount?
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Old 4 Weeks Ago   #5
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Re: Rough Idle / Misfire - When car is warm?

Quote Originally Posted by SRafferty View Post
"1) When i start the car up from cold the rev counter / needle is high at about 1100 revs for about 30 secs and then levels out to about 800 revs. I have the most MINOR HAIRLINE of cracks in one of the air hoses attached on the engine cover - So not sure if that is causing high initial revs"

Higher RPM when cold is normal.

Could your judder be worn engine mount?
Hey rafferty. Thanks for input. I'll give this a check but I doubt it is. If it is its going to be one of those it looks fine but could it still be bad type of things lol. Is there anything other than a visual check that you can do to check if the mounts are worn?
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