Any Advice or Help is really appreciated as I love this car
So my 2006 Polo 9N3 has been idling rough for the last 2 months, and in the last 2 weeks, it's gotten much worse.
If idling for more than 30/40 Seconds the car starts to shake harshly and there is a loss of power if driven, then the check engine light flashes.
but when driving normally the car is absolutely fine.
I brought it to a mechanic and he suggested it might be a burnt-out exhaust valve, so we did a compression test and there were no abnormalities. we replaced the ignition coils and spark plugs with brand new NGK's. but the problem still occurs.
I have temporarily got around the issue by avoiding traffic lights and turning off the car if sitting for more than 10 seconds.
I don't have any sort of diagnostic tool and cannot scan it myself.
Once again Any Advice or Help is really appreciated as I love this car.
Help! Extremely Rough Idle
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- Drives: 2015 6C GTI DSG Oryx white 3 door.
- Location: South west uk
Re: Help! Extremely Rough Idle
What engine is fitted ? 1.2 3 cylinder ?
Re: Help! Extremely Rough Idle
Apologizes Yes, Its a 1.2 3 Cylinder 55/54BHP
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- Silver Member
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- Joined: Mon Sep 03, 2018 9:43 pm
- Drives: 2015 6C GTI DSG Oryx white 3 door.
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Re: Help! Extremely Rough Idle
Do you have the compression readings still ?
Take a good look through this thread and compare your results to these
viewtopic.php?t=77259
Get the codes read and recorded
Take a good look through this thread and compare your results to these
viewtopic.php?t=77259
Get the codes read and recorded
Re: Help! Extremely Rough Idle
Thanks for the reply
I’ll get onto the mechanic to get the results over to me, I didn’t see any results he just said that it was all good. Im a reoccurring customer to him so I don’t see why he would say otherwise.
I’ll have a look through the tread and post an update when I have a look
Thanks Pal
I’ll get onto the mechanic to get the results over to me, I didn’t see any results he just said that it was all good. Im a reoccurring customer to him so I don’t see why he would say otherwise.
I’ll have a look through the tread and post an update when I have a look
Thanks Pal
Re: Help! Extremely Rough Idle
Also just to let you know I received your PM, I’m not being rude or ungrateful I just can’t seem to reply yet as my account is newly registered.CarbonChaos wrote: ↑Thu Apr 14, 2022 10:29 pm Do you have the compression readings still ?
Take a good look through this thread and compare your results to these
viewtopic.php?t=77259
Get the codes read and recorded
But spot on mate I’ll do as you say and let you know how I get on
Enjoy your weekend
Kind Regards
Re: Help! Extremely Rough Idle
I still wouldn't rule out a valve problem as these can stick partly open occasionally which leads to valve/seat burning and eventual permanent low compression, however there are a few things to check out before going down that road as it idles OK for 30secs or so. A vacuum gauge connected to the brake servo pipe would tell alot and should be ~ 16ins. I would also check all vacuum lines (like brake servo) for cracks, some of these pipes are plasticky and difficult to see any cracks, generally a permanent crack results in a high idling speed. Another (unlikely) possibility is that the TB (throttle butterfly) is jamming on a carbon build up in the throttle body/plate, a squirt of even wd40 onto the throttle plate with engine stopped will sometimes clear this. Also a suspect would be the PCV valve which may be operating erratically, very easy to change this. I will edit and try to attach a photo/link later.
Can't post photo but here is a link to symptoms of a failed one. https://www.autoguru.com.au/repairs/pcv ... wagen/polo
Can't post photo but here is a link to symptoms of a failed one. https://www.autoguru.com.au/repairs/pcv ... wagen/polo
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Re: Help! Extremely Rough Idle
Suggest checking valve timing.
I understand that it's not uncommon for timing chain to jump even after an oil change.
It's a bit tricky but i used my phones camera.
https://www.youtube.com/watch?v=_dYEDZNNwws
I understand that it's not uncommon for timing chain to jump even after an oil change.
It's a bit tricky but i used my phones camera.
https://www.youtube.com/watch?v=_dYEDZNNwws