i30 Owners Club

GOT PROBLEMS OR ISSUES? => PETROL => Topic started by: smashbie on January 04, 2020, 06:30:47

Title: 2009 i30 Backing off issue
Post by: smashbie on January 04, 2020, 06:30:47: Hi all,

I've recently purchased a used 2009 i30 Hatch (Manual). I've noticed that when i'm at cruising speed and take my foot off the accelerator pedal it seems a bit 'choppy' / jerky, until i press the accelerator again. It only happens when I take my foot off the accelerator either slightly or entirely.

Any ideas on this?

Thanks.
Title: Re: 2009 i30 Backing off issue
Post by: Dazzler on January 04, 2020, 08:55:34: Welcome smashbie,

I'm trying to imagine that scenario. Could be a variety of obscure/diverse reasons.

Don't know what others think, buy maybe a grabbing brake or two?

An engine timing issue? Slightly blocked fuel filter or injectors?

Or something else I haven't even thought of... :crazy2:

Edit: Does the engine appear to misfire or stutter?
Title: Re: 2009 i30 Backing off issue
Post by: smashbie on January 04, 2020, 09:02:24: Thanks, no it doesn’t seem to affect the engine. No misfire etc. it’s hard to describe it’s to do with the pedal being released somewhat when at cruising speed.
Title: Re: 2009 i30 Backing off issue
Post by: Dazzler on January 04, 2020, 09:07:32: Quote from: smashbie on January 04, 2020, 09:02:24
Thanks, no it doesn’t seem to affect the engine. No misfire etc. it’s hard to describe it’s to do with the pedal being released somewhat when at cruising speed.

Oh ok, that makes me suspect some sort of sensor malfunction. We have some very clued up technicians on here, but I'm not one of them. :snigger:
Title: Re: 2009 i30 Backing off issue
Post by: Shambles on January 04, 2020, 09:41:49: Sounds like the fuel runoff isn't behaving - almost as if the fuel supply isn't being shut down completely.
Title: Re: 2009 i30 Backing off issue
Post by: smashbie on January 04, 2020, 20:24:20: Thanks for your help everyone I’ll get it looked into.
Title: Re: 2009 i30 Backing off issue
Post by: smashbie on February 03, 2020, 04:52:10: Just an update on what this issue was. A mechanic checked the car and advised that it is a "torn rear engine mount" something to do with a 'transmission radius mount' that is causing the issue. They are going to charge $175 to fix the issue and the problem will go away.
Title: Re: 2009 i30 Backing off issue
Post by: mickd on February 03, 2020, 08:15:45: Well that stops the whole thing from jerking around. Ask for the old one, take a pic and put up here for everyone 's curiosity. :goodjob:
Title: Re: 2009 i30 Backing off issue
Post by: Dazzler on February 03, 2020, 15:51:03: Quote from: smashbie on February 03, 2020, 04:52:10
Just an update on what this issue was. A mechanic checked the car and advised that it is a "torn rear engine mount" something to do with a 'transmission radius mount' that is causing the issue. They are going to charge $175 to fix the issue and the problem will go away.

Hope that fixes it please provide a further update when repair is completed. The mounts aren't cheap so that seems like a fair price including labour.
Title: Re: 2009 i30 Backing off issue
Post by: smashbie on February 08, 2020, 01:38:05: Replaced it today. This is what it looked like. Apparently was this way for quite a while (I only bought the car a month ago):

(https://i.imgur.com/AtQ6Mwc.jpeg)

Glad its fixed.
Title: Re: 2009 i30 Backing off issue
Post by: nzenigma on February 08, 2020, 03:07:06: Thanks for the photo and reply. No way we could have predicted that.

It is badly damaged, :head_knock: Im curious about the kms on the clock and any known accident history?

Glad your guy was on the ball. :goodjob2:
Title: Re: 2009 i30 Backing off issue
Post by: smashbie on February 08, 2020, 03:24:33: 240k on the clock. I’m not aware of any accident history (last owner said there wasn’t any accidents but he only had the car for 2 years).
Title: Re: 2009 i30 Backing off issue
Post by: mickd on February 08, 2020, 06:36:41: Yep, that looks totally roooted, :lol:.
Thanks for the update and pic, cheers
Title: Re: 2009 i30 Backing off issue
Post by: Dazzler on February 08, 2020, 10:06:08: Quote from: smashbie on February 08, 2020, 01:38:05
Replaced it today. This is what it looked like. Apparently was this way for quite a while (I only bought the car a month ago):

(https://i.imgur.com/AtQ6Mwc.jpeg)

Glad its fixed.

Until fairly recently I visualized engine mounts just being a rubber bush and thought they seemed dear for just a rubber block or bush, then Gerard (I think) posted some pictures. :crazy1: