Make a donation

Author Topic: Rough engine  (Read 1222 times)

Offline Raziel

  • Can't Read PM's Yet!
  • *
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 4
Rough engine
« on: April 12, 2021, 07:32:46 pm »
Hi guys, went for a spirited drive at the weekend, car drove well but when I got home it sounded rough, when I turned the car off and restarted it sounded better. I have, a few months ago replaced the PCV, cam follower and cam chain and tensioner. I smoke tested the intake and there is a leak at the back of the engine around the rear PCV area, would that cause this or is it something else? Any help will be greatly appreciated.

Offline maxamplitude10

  • Always Involved
  • ****
  • Thank You
  • -Given: 10
  • -Receive: 5
  • Posts: 227
  • '07' ED30 Manual 3Dr
    • Email
Re: Rough engine
« Reply #1 on: April 13, 2021, 04:23:37 am »
Hi Raziel could you describe "rough" in a little more detail please?

Max

Offline Raziel

  • Can't Read PM's Yet!
  • *
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 4
Re: Rough engine
« Reply #2 on: April 13, 2021, 10:01:22 am »
Lumpy and uneven idle, an a bit of a rattling sound.

Offline DBXdarkangel

  • Always Involved
  • ****
  • Thank You
  • -Given: 18
  • -Receive: 9
  • Posts: 361
    • Email
Re: Rough engine
« Reply #3 on: April 13, 2021, 09:04:29 pm »
Lumpy and uneven idle, an a bit of a rattling sound.

Can you post a video of the noise and are you able to check for fault codes?

Offline Raziel

  • Can't Read PM's Yet!
  • *
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 4
Re: Rough engine
« Reply #4 on: April 13, 2021, 10:04:05 pm »
I do have a video but I don’t know how to post it.

Offline Havelin150

  • Just Arrived
  • **
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 16
Re: Rough engine
« Reply #5 on: April 15, 2021, 08:27:16 am »
I do have a video but I don’t know how to post it.

Upload to YouTube and post the link. I think that's your best bet.

Offline mjmallia

  • Won't Shut up.
  • *****
  • Thank You
  • -Given: 2
  • -Receive: 47
  • Posts: 515
Re: Rough engine
« Reply #6 on: April 16, 2021, 07:42:16 am »
Any air leak will make it idle bad as the system is working in a vacuum state.
Mike

South Coast

S3 8L ---- Golf Mk4 GT TDI ---- Lupo GTI ----  A4 B6 Sline ---- Golf Mk5 GTI

Offline pudding

  • Global Moderator
  • Just look at my post count
  • *
  • Thank You
  • -Given: 2
  • -Receive: 670
  • Posts: 8228
Re: Rough engine
« Reply #7 on: April 16, 2021, 09:47:03 pm »
Need a decent scan tool really, to A) make sure no sensors are flagged as defective, and B) check the long term fuel trims.



2007 ED30 | 2009 TDI 140 | 2016 BMW 330D